26. A mole of perfect gas at 27°C is expanded isothermally from an initial pressure of 3.00 atm to a final pressure of 1.00 atm in two ways (a) reversibly, (b) against a constant external pressure of 1.00 atm. Cal- culate q, w, AU, AH, AS, ASsurr, AStot for both. (+2.74 kJ, -2.74 kJ, 0, 0, 9.13 J/K, -9.13 J/K, 0 ||1.66 kJ, -1.66 kJ, 0, 0, 9.13 J/K, -5.53 J/K, 3.60 J/K) ISOT : Q = -162 T=27°C - 300 K
26. A mole of perfect gas at 27°C is expanded isothermally from an initial pressure of 3.00 atm to a final pressure of 1.00 atm in two ways (a) reversibly, (b) against a constant external pressure of 1.00 atm. Cal- culate q, w, AU, AH, AS, ASsurr, AStot for both. (+2.74 kJ, -2.74 kJ, 0, 0, 9.13 J/K, -9.13 J/K, 0 ||1.66 kJ, -1.66 kJ, 0, 0, 9.13 J/K, -5.53 J/K, 3.60 J/K) ISOT : Q = -162 T=27°C - 300 K
Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter17: Chemcial Thermodynamics
Section: Chapter Questions
Problem 17.103QE: A 220-ft3 sample of gas at standard temperature and pressure is compressed into a cylinder, where it...
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Transcribed Image Text:26. A mole of perfect gas at 27°C is expanded isothermally from an initial
pressure of 3.00 atm to a final pressure of 1.00 atm in two ways (a)
reversibly, (b) against a constant external pressure of 1.00 atm. Cal-
culate q, w, AU, AH, AS, ASsurr, AStot for both. (+2.74 kJ, -2.74
kJ, 0, 0, 9.13 J/K, -9.13 J/K, 0 ||1.66 kJ, -1.66 kJ, 0, 0, 9.13 J/K,
-5.53 J/K, 3.60 J/K)
T=27°C 300 K
b) w - - Peut av = -(1 atm) (ner - her
NRT
)
Pf
P₁
IsoT w
AU÷0
q
= -((atm) 1 mol. 8.314 /mol.K - 300K
I atm
W = -16.6 kJ.
9 = 16.6 kJ
AS: grev=
UT
Imol. 8.314 /mol.K·3.00K
3 atm
27. A block of copper of mass 500 g and initially at 293 K is in thermal
contact with an electric heater of resistance 1 kOhm and negligible
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