Physical Chemistry
2nd Edition
ISBN: 9781133958437
Author: Ball, David W. (david Warren), BAER, Tomas
Publisher: Wadsworth Cengage Learning,
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Chapter 4, Problem 4.61E
Interpretation Introduction
Interpretation:
The form of the Gibbs-Helmholtz equation for Helmholtz energy instead of Gibbs free energy is to be stated. The condition that must be held constant is to be stated.
Concept introduction:
Helmholtz energy of a system represents the useful work from a closed
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Define Gibbs energy.
4. - What is a catalyst?
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of the uncatalyzed reaction.
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What are the values of q, w, AU, AH, AS, ASsurr, and ASuniv for the following a constant pressure process for a
system containing 0.356 moles of CH3OH ?
CH3OH(I, 22.0 °C, 1.00 atm) → CH3OH(g, 125.0 °C, 1.00 atm)
Assume that the volume of CH3OH(I) is much less than that of CH3OH(g) and that CH3OH(g) behaves as an ideal
gas. Also, assume that the temperature of the surroundings is 125.0 °C.
Data:
Molar heat capacity for CH3OH(I), Cp,m = 81.1 J K¯¹ mol-¹
Molar heat capacity for CH3OH(g), Cp,m = 44.1 J K¯¹ mol-¹
Enthalpy of vaporization, AvapH = 35.2 kJ mol-¹ at 64.7 °C and 1.00 atm
Enter answers that are accurate to three (3) or more significant figures.
q= Number J
W= Number J
AU= Number J
ΔΗ= Number J
JK-1
AS = Number
ASsurr =
ASuniv
=
Number JK-1
JK-1
Number
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Chapter 4 Solutions
Physical Chemistry
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