1. Two liters of N2 at 0°C and 5 atm pressure are expanded isothermally against a constant pressure of 1 atm until the pressure of the gas is also 1 atm. Assuming the gas to be ideal, what are the values of W, AE, Q and AH. Express you final answers in calories. (NOTE: 24.22 cal = 1 L-atm) 2. A gas expands against a variable opposing pressure given by P = 10/V atm, where Vis the volume of the gas at each stage of expansion. Further, in expanding from 10 to 100 liters, the gas undergoes a change in internal energy of AE = 100 cal. How much heat, in calories, is absorbed by the gas during the process? [NOTE: 1 atm = 24.22 cal] 3. It is interesting to compare the "fuel value of a hydrocarbon in a world where fluorine rather than oxygen is the combustion agent. The enthalpy of formation of CF4(g) is -679.9 ki/mol. The enthalpy of formation two reactions is the more exothermic? CH₂(g) + 2O₂(g) CH4(g) + 4 F₂(g) CO₂(g) + 2 H₂O(g) CF4(g) + 4 HF(g)
1. Two liters of N2 at 0°C and 5 atm pressure are expanded isothermally against a constant pressure of 1 atm until the pressure of the gas is also 1 atm. Assuming the gas to be ideal, what are the values of W, AE, Q and AH. Express you final answers in calories. (NOTE: 24.22 cal = 1 L-atm) 2. A gas expands against a variable opposing pressure given by P = 10/V atm, where Vis the volume of the gas at each stage of expansion. Further, in expanding from 10 to 100 liters, the gas undergoes a change in internal energy of AE = 100 cal. How much heat, in calories, is absorbed by the gas during the process? [NOTE: 1 atm = 24.22 cal] 3. It is interesting to compare the "fuel value of a hydrocarbon in a world where fluorine rather than oxygen is the combustion agent. The enthalpy of formation of CF4(g) is -679.9 ki/mol. The enthalpy of formation two reactions is the more exothermic? CH₂(g) + 2O₂(g) CH4(g) + 4 F₂(g) CO₂(g) + 2 H₂O(g) CF4(g) + 4 HF(g)
Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
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![Activities and Assessments:
1. Two liters of N2 at 0°C and 5 atm pressure are expanded isothermally against a constant
pressure of 1 atm until the pressure of the gas is also 1 atm. Assuming the gas to be ideal,
what are the values of W, AE, Q and AH. Express you final answers in calories. (NOTE:
24.22 cal = 1 L-atm)
2. A gas expands against a variable opposing pressure given by P= 10/V atm, where V is
the volume of the gas at each stage of expansion. Further, in expanding from 10 to 100
liters, the gas undergoes a change in internal energy of AE = 100 cal. How much heat, in
calories, is absorbed by the gas during the process? [NOTE: 1 atm = 24.22 cal]
3. It is interesting to compare the "fuel value" of a hydrocarbon in a world where fluorine
rather than oxygen is the combustion agent. The enthalpy of formation of CF4(g) is-679.9
kl/mol. The enthalpy of formation two reactions is the more exothermic?
CH₂(g) + 2 O₂(g)
CH₂(g) + 4 F₂(g)
CO₂(g) + 2 H₂O(g)
CF4(g) + 4 HF(g)
4. At the end of 2009, global population was about 6.8 billion people. What mass of glucose
(C6H1206) in kg would be needed to provide 1500 Cal/person/day of nourishment to the
global population for one year? Assume that glucose is metabolized entirely to CO2 and
H2O(l](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6d15e0e4-5a07-4727-a973-50b025b0b931%2F1b3c184c-362e-45df-b740-64fd1fa6ec12%2F8r1u4_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Activities and Assessments:
1. Two liters of N2 at 0°C and 5 atm pressure are expanded isothermally against a constant
pressure of 1 atm until the pressure of the gas is also 1 atm. Assuming the gas to be ideal,
what are the values of W, AE, Q and AH. Express you final answers in calories. (NOTE:
24.22 cal = 1 L-atm)
2. A gas expands against a variable opposing pressure given by P= 10/V atm, where V is
the volume of the gas at each stage of expansion. Further, in expanding from 10 to 100
liters, the gas undergoes a change in internal energy of AE = 100 cal. How much heat, in
calories, is absorbed by the gas during the process? [NOTE: 1 atm = 24.22 cal]
3. It is interesting to compare the "fuel value" of a hydrocarbon in a world where fluorine
rather than oxygen is the combustion agent. The enthalpy of formation of CF4(g) is-679.9
kl/mol. The enthalpy of formation two reactions is the more exothermic?
CH₂(g) + 2 O₂(g)
CH₂(g) + 4 F₂(g)
CO₂(g) + 2 H₂O(g)
CF4(g) + 4 HF(g)
4. At the end of 2009, global population was about 6.8 billion people. What mass of glucose
(C6H1206) in kg would be needed to provide 1500 Cal/person/day of nourishment to the
global population for one year? Assume that glucose is metabolized entirely to CO2 and
H2O(l
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