How many joules are required to heat 75 grams of water from -85*C to 185*C? (Csteam 1.84 Jlg*'C, Cwater 4.184 Jlg*%C, Cice 2.09 ) Jlg* C, AHfusion 6.01 kJ/mol, AHvap 40.7 klmol):
Answers
Answer:
many joules are required to heat 75 grams of water from -85*C to 185*C? (Csteam 1.84 Jlg*'C, Cwater 4.184 Jlg*%C, Cice 2.09 ) Jlg* C, AHfusion 6.01 kJ/
The energy requirements,
345,524 joules are required to heat 75 grams of water from -85*C to 185*C, taking into account the phase changes at 0*C and 100*C.
To solve this problem, we need to break it down into two parts: heating the water from -85*C to 0*C, and then from 0*C to 185*C. We also need to take into account the energy required for the phase changes at 0*C and 100*C.
First, we need to calculate the energy required to heat 75 grams of water from -85*C to 0*C:
Q = mcΔT
Q = 75g x 4.184 J/g*C x (0 - (-85))
Q = 26,541 J
Next, we need to calculate the energy required for the phase change from ice to water at 0*C:
Q = n x AHfusion
n = m/M (where m is the mass and M is the molar mass of water)
n = 75g / 18.015 g/mol = 4.159 mol
Q = 4.159 mol x 6.01 kJ/mol x 1000 J/kJ = 25,180 J
Now we need to calculate the energy required to heat the water from 0*C to 100*C:
Q = mcΔT
Q = 75g x 4.184 J/g*C x (100 - 0)
Q = 31,380 J
We also need to take into account the energy required for the phase change from water to steam at 100*C:
Q = n x AHvap
n = m/M (where m is the mass and M is the molar mass of water)
n = 75g / 18.015 g/mol = 4.159 mol
Q = 4.159 mol x 40.7 kJ/mol x 1000 J/kJ = 169,033 J
Finally, we need to calculate the energy required to heat the steam from 100*C to 185*C:
Q = mcΔT
Q = 75g x 1.84 J/g*C x (185 - 100)
Q = 93,390 J
Adding up all of the energy requirements, we get:
26,541 J + 25,180 J + 31,380 J + 169,033 J + 93,390 J = 345,524 J
Therefore, 345,524 joules are required to heat 75 grams of water from -85*C to 185*C, taking into account the phase changes at 0*C and 100*C.
Learn more about energy here
https://brainly.com/question/1932868
#SPJ11
Related Questions
in the beta oxidation pathway, what is the product of the enzyme acyl coa-dehydrogenase? assume the starting saturated fatty acid contains n carbons and n is an even number. ch3(ch2)n-4coch2co-coa ch3(ch2)n-2co-coa ch3(ch2)n-4hc
Answers
In the beta oxidation pathway, the product of the enzyme acyl coa dehydrogenase is CH3CO-CoA(acety coA).
Describe oxidation.Initially, the word "oxidation" was used to refer to chemical processes in which a element reacts with oxygen. An illustration of this is the oxidation on magnesium in the formation of magnesium oxide when magnesium and oxygen react.
What transpires throughout oxidation?An electron transfer occurs during oxidation. In other words, electrons are lost during oxidation. The reverse of oxidation is a process called reduction, which results in an electron gain. The magnesium ion loses electrons in the mechanism described above, forming magnesium oxide.
To know more about oxidation visit :
https://brainly.com/question/16976470
#SPJ4
Which of the following lipoproteins has the highest ratio: proteins/lipids? Select one: a. VLDL b. LDL c. HDL d. Chylomicrons
Answers
Among VLDL, LDL, HDL, and Chylomicrons, the lipoprotein that has the highest protein/lipid ratio is Chylomicrons.
Of all the following lipoproteins, high-density lipoprotein (HDL) has the highest ratio of protein to lipids. HDL is a lipoprotein particle that has a high concentration of protein and a low concentration of lipids, making it the most protein-rich lipoprotein. HDL is sometimes known as the "good" cholesterol since it helps to transport extra cholesterol from the arteries to the liver, where it can be processed and eliminated.
In general, the greater the protein/lipid ratio, the better the lipoprotein is for cardiovascular health. Because it contains less protein and more cholesterol, very low-density lipoprotein (VLDL) and low-density lipoprotein (LDL) are considered to be more harmful. Chylomicrons, on the other hand, are the largest lipoproteins and are mostly composed of triglycerides. As a result, the protein content of chylomicrons is low, and the lipids content is high.
Therefore, chylomicrons do not have the highest ratio of proteins to lipids. In conclusion, among VLDL, LDL, HDL, and Chylomicrons, the lipoprotein that has the highest protein/lipid ratio is high-density lipoprotein (HDL).
So, Among VLDL, LDL, HDL, and Chylomicrons, the lipoprotein that has the highest protein/lipid ratio is Chylomicrons and option d is the correct answer.
Learn more about lipoprotein here,
https://brainly.com/question/13417510
#SPJ11
Please help me asap!
Answers
Answer:
bebe bebe bebe
Explanation:
What is the name of the molecule shown below?
O A. 2-octene
B. 3-octene
C. 3-octyne
O D. 2-octyne
Answers
Answer:
2-octene
Explanation:
A P E X
2-octyne is the name of the molecule given. Therefore, the correct option is D.
An organic substance having the chemical formula \(C_8H_1_4\) is 2-octyne. It has a triple bond between the carbon atoms, which makes it an alkyne. The triple bond is located at the second carbon position in the octane chain, as indicated by the systematic IUPAC name of this molecule, 2-octane. 2-Octyne is an odorless, colorless liquid that is insoluble in water.
It can participate in various functional group transformations and undergo addition reactions. It can be used in organic synthesis as a building block for the construction of more complex compounds. It can also be used as a solvent or mediator in chemical processes.
Therefore, the correct option is D.
Learn more about Chemical formula, here:
https://brainly.com/question/32018188
#SPJ6
quizletbi/o life carcin/o cancer cardi/o heart chem/o chemical cis/o to cut dermat/o skin enter/o small intestine gastr/o
Answers
bi/o life carcin/o cancer cardi/o heart chem/o chemical cis/o to cut dermat/o skin enter/o small intestine gastr/o stomach
What is Stomach ?The J-shaped organ that digests food is the stomach. It generates acids and enzymes, which are molecules that cause chemical reactions (digestive juices). Food is broken down by this mixture of enzymes and digestive juices so that it may move to your small intestine. A portion of the gastrointestinal (GI) tract includes your stomach.
Storing food and releasing it to the intestines at a pace that allows the intestines to process it is the stomach's primary job. In order to expand the food's surface area in preparation for digestion, the stomach mixes and grinds the food into a finely split chyme.Learn more about Stomach here:
https://brainly.com/question/1563209
#SPJ4
Which of the following ions (if equal in concentration) will contribute most to elevating the boiling point of H₂O? A. Fe3+ B. Ca2+ C. All would contribute equally D. Na+
Answers
A. Fe3+. This is because Fe3+ has a higher charge than Ca2+ and Na+, which means it has a stronger attraction to the water molecules and therefore causes more disruption to the water's ability to vaporize.
Additionally, the concentration of Fe3+ ions would need to be much lower than Ca2+ and Na+ ions to have the same effect on the boiling point of water due to its higher charge.
The boiling point elevation depends on the number of ions present in the solution. In this case, if all ions have equal concentration, Fe3+ (A) will contribute most to elevating the boiling point of H₂O, because it has the highest charge and will produce more ions when dissolved in water.
Visit here to learn more about molecules brainly.com/question/19922822
#SPJ11
Write the formula for sodium chloride.
Write the formula for sodium oxide.
Answers
Answer:
The formula for sodium chloride is NaCl
The formula for sodium oxide is Na2O
Explanation:
The formula for sodium oxide is Na2O
The average
energy of a gas depends
on its temperature.
Answers
When reading the label on a reagent container, what are the three most important pieces of information?.
Answers
When reading the label on a reagent container, the three most important pieces of information include:
The chemicalConcentrationHazard warning.What is a Reagent?This is referred to a chemical which is added to a mixture thereby resulting in a chemical reaction occurring and have different properties which is why the label has to contain their features.
It is therefore best to check the label for properties such as name and concentration so as to enable individuals use it for the right type of reactions and is also important in prevention of the risk of accident by individuals.
Read more about Reagent here https://brainly.com/question/6959208
#SPJ1
in-lab question 10c. a general rule concerning temperature changes to equilibrium systems is that the input of energy (raising the temperature) shifts the equilibrium to the higher energy side of the equilibrium. based on your observations, which side of the equilibrium is the higher energy side?
Answers
The reactant side of the equilibrium is the higher energy side.
What is equilibrium ?The equilibrium constant value falls as temperature creations. An preference in temperature increases the value of the equilibrium constant when the familiar response isendothermic.As the temperature fluctuates, so does the equilibrium place.
Le Chatelier's Principle :Le Chatelier's Principle states that the point of equilibrium shifts in a row that tends to switch the change you have made.However, the equilibrium place will relocate so that it lowers the temperature formerly more, If you uplift the temperature. By encouraging the procedure that absorbs heat, it'll achieve that. That will be the return response in the equilibrium we exactly interrogated, as the forward response is exothermic.
Learn more about equilibrium :
brainly.com/question/517289
#SPJ4
What are the names of these molecules and what’s their molecule geometry
Answers
Answer
1. The name of the first structure is c1hloromethan and has a tTetrahedra geometry..
2. The name of the second structure is ammonium ion and has a tetrahedral geometry.
3. The name of the third structure is sulfur hexafluoride anion and has an octahedral geometry.
If the atomic number of an element is 6 and the atomic mass is 12.01, how many protons are there in the nucleus?
A. 12
B. 6
C. 24
D. 52
Answers
The atomic number of an element represents the number of protons in the nucleus. In this case, the atomic number is 6. Therefore, there are 6 protons in the nucleus of this element. The correct answer is B. 6.
The atomic number of an element represents the number of protons in the nucleus. In this case, the atomic number is 6, which means there are 6 protons in the nucleus. The atomic mass is the sum of the number of protons and neutrons in the nucleus. Since the atomic mass is 12.01 and the atomic number is 6, we can subtract 6 from 12.01 to get the number of neutrons. This gives us a neutron count of approximately 6.01.
Therefore, The answer is B. 6 protons are in the nucleus of this element.
Learn More about nucleus here :-
https://brainly.com/question/21083478
#SPJ11
31.1 grams of O2 and 84.3 grams of F2 are placed in a container with a volume of94.9 L. Find the total pressure if the gasses are at a temperature of 55.77 ° c
Answers
In this question, we have:
31.1 grams of O2
84.3 grams of F2
94.9 L of total volume
55.77°C of temperature which is equal to 328.92 K
Now, to find the pressure of this container, we can find the number of moles of each gas, and add both values together making it one value of moles and then we will use the Ideal gas law to find the pressure, so let's start with O2
The molar mass of O2 is 32g/mol and we have 31.1 grams
32g = 1 mol
31.1g = x moles
x = 0.972 moles of O2
Now for F2, the molar mass is 38g/mol, and we have 84.3 grams
38g = 1 mol
84.3g = x moles
x = 2.22 moles of F2
Now we add these values, 0.972 + 2.22 = 3.192 moles
And now we can use the ideal gas law formula:
PV = nRT
Remember that R is the gas constant, 0.082
P * 94.9 L = 3.192 * 0.082 * 328.92
94.9P = 86.1
P = 0.91 atm
calculate the total mass of libr(s) required to make 500.0 grams of an aqueous solution of libr that has a concentration of 388 parts per million. your response must include both a correct numerical setup and the calculated result.
Answers
Answer: 1,200,659.79
Explanation:
A 35.40 gram hydrate of sodium carbonate, Na2CO3•nH2O, is heated to a constant mass. Its final weight is 30.2 g. What is formula for the hydrate?A. Na2CO3∙1H2OB. Na2CO3∙2H2OC. Na2CO3D. Na2CO3∙3H2O
Answers
First, we have to calculate the molecular weights of each molecule:
\(\begin{gathered} Na_2CO_3\text{ : 23*2+12+16*3= 106 g/mol} \\ H_2O\text{ : 1*2+16= 18 g/mol} \end{gathered}\)Then, we have to calculate the number of grams of water. We can calculate them because the process of evaporation lets us know the water amount that was retired:
\(g\text{ H}_2O\text{ = 35.40 g - 30.2 g=5.2 g H}_2O\)Then, we're gonna convert the grams of sodium carbonate alone (30.2 g) and the grams of water to moles:
\(\begin{gathered} 30.2\text{ g Na}_2CO_3\text{ * }\frac{1\text{ mol}}{106\text{ g}}=\text{ 0.2849 mol Na}_2CO_3\text{ }\approx0.3\text{ mol Na}_2CO_3 \\ \\ 5.2\text{ g H}_2O\text{ * }\frac{1\text{ mol}}{18\text{ g}}=\text{ 0.288 mol H}_2O\text{ }\approx\text{ 0.3 mol H}_2O \end{gathered}\)It means that the mole relation is 1:1 approx, as it is the same amount for both. Then, the formula is going to be:
\(Na_2CO_3\text{ . 1H}_2O\)It means that the answer is A.
Concentrated hydrochloric acid has 37.5% of HCl in mass and density of 1.2 g/cm
3
. What volume (in mL) of concentrated hydrochloric acid should be used to prepare 7 L of a 0.8 mol/L HCl(aq) concentration solution?
Answers
A 545 mL volume of concentrated hydrochloric acid should be used to prepare 7 L of a 0.8 mol/L HCl(aq) concentration solution.
How to Calculate Volume in a Chemical SolutionCalculate the number of moles of HCl required for the desired solution:
Moles of HCl = Concentration × Volume
= 0.8 mol/L × 7 L = 5.6 moles
Determine the mass of HCl required:
Mass of HCl = Moles of HCl × Molar Mass of HCl
The molar mass of HCl is approximately 36.46 g/mol.
Mass of HCl = 5.6 moles × 36.46 g/mol = 204.376 g
Calculate the mass of concentrated hydrochloric acid needed:
Concentrated hydrochloric acid has a concentration of 37.5% HCl in mass.
Mass of concentrated HCl = Mass of HCl / Percentage of HCl
Mass of concentrated HCl = 204.376 g / 0.375 = 545.003 g
Determine the volume of concentrated hydrochloric acid using its density:
Density = Mass / Volume
Volume = Mass / Density
Volume = 545.003 g / 1.2 g/cm³
As we want the volume in milliliters (mL), we need to convert cm³ to mL:
Volume = 545.003 mL / 1 cm³ = 545.003 mL
Therefore, approximately 545 mL of concentrated hydrochloric acid should be used to prepare 7 L of a 0.8 mol/L HCl(aq) concentration solution.
Learn more about chemical reaction here:
https://brainly.com/question/11231920
#SPJ1
(s)-1-bromo-1-fluoroethane reacts with naoch3 to give pure (s)-1-fluoro-1-methoxyethane. why is bromine and not fluorine replaced?
Answers
The main reason that bromine is replaced instead of fluorine is the reactivity of the halogen.
The given compound (s)-1-bromo-1-fluoroethane reacts with NaOCH₃ to give pure (s)-1-fluoro-1-methoxyethane.
Bromine (Br) is more reactive than fluorine (F) and has a lower electronegativity value, which makes it easier to replace with methoxy (-OCH₃).
Fluorine is one of the most reactive elements, and its substitution requires more reactive conditions.
Bromine is the better choice because it has lower reactivity than fluorine. Also, the replacement reaction of a halogen with another group depends on the position of the halogen and the strength of the bond between the halogen and carbon.
Since bromine is placed near to the carbon bonded to the fluorine atom than fluorine, the reaction proceeds with bromine and produces (s)-1-fluoro-1-methoxyethane.
Therefore, bromine is replaced instead of fluorine because it is more reactive and its position is closer to the carbon bonded to fluorine.
know more about displacement reaction here:
https://brainly.com/question/32802147
#SPJ11
Classify each of the following reactions by type:
a.
S8 + 8O2 → 8SO2 + energy
b.
6CO2 + 6H2O → C6H12O6 + 6O2
c.
2NaHCO3 → Na2CO3 + H2O + CO2
d.Zn + 2HCl → ZnCl2 + H2
Answers
The correct classification of the following reaction types is as follows:
S8 + 8O2 → 8SO2 + energy = combination 6CO2 + 6H2O → C6H12O6 + 6O2 = synthesis 2NaHCO3 → Na2CO3 + H2O + CO2 = decomposition Zn + 2HCl → ZnCl2 + H2 = single displacementWhat is a chemical reaction?A chemical reaction is a process that involves the breaking or making of interatomic bonds, in which one or more substances are changed into others.
The following are types of chemical reactions;
Synthesis or combination reaction; this involves the combination of two or more elements to form a compound. Decomposition reaction is that which involves the breakdown of a compound into its constituent elements. Single replacement reaction occurs when one element is replaced by another in a compound.Learn more about chemical reaction at; https://brainly.com/question/22817140
#SPJ4
HOTS
A container made of same metal when exposed to
humid climate develops green coating.
Identify the metal. Give reason for both a & b.
Answers
Winter road treatments to clear snow and ice can lead to cracking in the pavement. An experiment will be conducted comparing four treatments: sodium chloride, calcium chloride, a proprietary organic compound, and sand. Can you think of at least ONE nuisance factor to consider? Discuss if that factor can be used as a blocking factor.
Answers
Blocking can improve the precision of the experiment by reducing the variability caused by nuisance factors
One nuisance factor to consider in the experiment comparing the four winter road treatments is the variation in pavement conditions.
The condition of the pavement, such as its age, composition, and surface quality, can influence its susceptibility to cracking. This variation in pavement conditions can introduce an additional source of variability that may affect the results of the experiment.
In this case, the pavement condition can be used as a blocking factor. By blocking, we mean grouping or categorizing the experimental units (e.g., sections of pavement) based on their similar pavement conditions.
This allows us to account for the nuisance factor and reduce its influence on the comparison of the road treatments.
By using pavement condition as a blocking factor, we can ensure that each treatment is applied to sections of pavement that have similar conditions.
This helps to minimize the impact of pavement variability on the observed cracking and allows us to focus on comparing the effectiveness of the different winter road treatments.
Blocking can improve the precision of the experiment by reducing the variability caused by nuisance factors, making the treatment comparisons more robust and reliable.
It allows for a more accurate assessment of the effects of the road treatments while accounting for potential confounding variables.
Learn more about Blocking from the given link
https://brainly.com/question/30884243
#SPJ11
Why are yeast cells used in making bread?
Answers
Answer:
Yeast is used for the leavening of bread. Yeast uses the sugars and oxygen in dough to produce more yeast cells and carbon dioxide gas. The carbon dioxide makes the dough rise which gives the bread a light and spongy texture. Yeast also works on the gluten network.
Explanation:
what molecule supplies the energy for the reaction that converts gal3p to rubp and by which process was this molecule generated?
Answers
ATP molecule supplies the energy for the reaction that converts gal3p to rubp and by LDR process was this molecule generated
RuBisCO, an enzyme, works with RuBP, another molecule, to catalyze a reaction with CO2. A G3P molecule with three carbons exits the cycle after three cycles and joins a carbohydrate molecule. The leftover G3P molecules continue to cycle in order to be renewed into RuBP, which is then prepared to interact with more CO2 energy . Using decreased NADP and ATP, glycerate 3-phosphate (GP) energy s changed into triose phosphate (TP). In the light-dependent processes, the reduced NADP serves as the reducing agent (hydrogen) and is transformed back into NADP. The process also uses ATP as an energy source.
Learn more about molecule here:
https://brainly.com/question/26044300
#SPJ4
The net force on a 300 kg lion is 3452 N as he runs after a deer. What is the lion's acceleration?
Answers
In the reaction : 2C2H6 + 7O2 = 4CO2 + 6H2O , how many moles of CO2 are produced when 13 mol of C2H6 are used up ?
Answers
Number of moles of CO2 which are produced when 13 mol of C2H6 are used up is 36.
What is mole?Moles is defined as the ratio of given mass of compound to the molar mass of compound.
Moles = given mass/ molar mass
What is molar mass of compound?Molar mass of compound is defined as the sum of atomic mass of all elements forming that compound.
Chemical reaction:2C2H6 + 7O2 = 4CO2 + 6H2O
As we noticed from the reaction that 2 moles of C2H6 produces 4 moles of CO2.
So, 1 moles of C2H6 produces 4/2 moles of CO2, means 2 moles of CO2.
Therefore, 13 moles of C2H6 produces 2 × 13 moles of CO2, means 26 moles of CO2.
Thus, we concluded that the number of moles of CO2 which are produced when 13 mol of C2H6 are used up is 36.
learn more about moles:
https://brainly.com/question/14676971
#SPJ9
which is more reactive hydrogen or Oganesson based on Electron affinity
Answers
The negatively charged atoms are known to show the electron affinity. Hydrogen is more reactive than oganesson based on electron affinity.
What is electron affinity ?The amount of energy released when an electron is added to a neutral atom to create a negatively charged ion is known as electron affinity in chemistry.
Due to the difficulty in determining atoms' electron affinities, values are only known for a small number of chemical elements, primarily halogens.
Similar towards how chlorine can achieve the configuration of noble gases and become an electronegative ion, hydrogen has a high attraction for electrons, becoming the hydrogen anion and obtaining the stable configuration of helium.
The first synthetic element to belong to group 18 (the noble gases), oganesson has the potential to be substantially more reactive than the other members of that group.
To learn more about electron affinities refer to the below link:
https://brainly.com/question/20212456
#SPJ1
in the diagram of a transverse wave shown, what does P represent?
Answers
In the diagram of a transverse wave of electromagnetic radiation P represents frequency.
What is electromagnetic radiation?The electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.
The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.
In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.The position of an electromagnetic wave in an electromagnetic spectrum is characterized by it's frequency or wavelength.They are emitted by electrically charged particles which undergo acceleration and subsequently interact with other charged particles.
Learn more about electromagnetic radiation,here:
https://brainly.com/question/10759891
#SPJ5
How do you write the chemical symbols for isotopes?
Answers
To write the chemical symbols for isotopes, you will need to include the element symbol, atomic number, and mass number. Here's a step-by-step explanation:
1. Identify the element symbol: This is the one or two-letter abbreviation for the element (e.g., H for hydrogen, O for oxygen).
2. Determine the atomic number: The atomic number represents the number of protons in the nucleus of an atom (e.g., hydrogen has an atomic number of 1, oxygen has an atomic number of 8).
3. Find the mass number: The mass number is the sum of protons and neutrons in the nucleus (e.g., hydrogen-1 has a mass number of 1, while hydrogen-2, or deuterium, has a mass number of 2).
4. Write the chemical symbol for the isotope: Combine the element symbol, atomic number, and mass number using the format A_Z X, where A is the mass number, Z is the atomic number, and X is the element symbol. For example, the chemical symbol for hydrogen-1 is 1_1 H, and for deuterium, it is 2_1 H.
To know more about "Isotopes" refer here:
https://brainly.com/question/29250331#
#SPJ11
How do you calculate neutrons of an element???
Answers
Answer:
The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus. The number of neutrons is equal to the difference between the mass number of the atom (M) and the atomic number (Z). Hope This Helps
Explanation:
Based on patterns in the periodic table, which list'shows the acids in order from strongest to weakest?
(1 point)
OHCI, H2S, PH3
OHCI, PH3, H2S
OH,S, PH3, HCI
PH3, H,S, HCI
Answers
Answer:
it is A.HCI, H2S, PH3
Explanation:
I took the test
I WILL MARK THE BRAINEST ANSWER AND NO LINKS
What is the IUPAC name of this branched alkane? Spelling must be exact.
Answers
Answer:
its got to be one of these
Examples of Simple Unbranched Alkanes
Name Molecular Formula Name
methane CH4 hexane
ethane C2H6 heptane
propane C3H8 octane
butane C4H10 nonane
Explanation: