Chemical Thermodynamics Question 394
Question: 2 moles of an ideal gas at $ 27{}^\circ C $ temperature is expanded reversibly from 2 L to 20 L. Find entropy change (R = 2 cal/mol K)
Options:
A) 92.1
B) 0
C) 4
D) 9.2
Show Answer
Answer:
Correct Answer: D
Solution:
- Entropy change at constant temperature $ =2.303nR,log\frac{V_1}{V_2}=2.303\times 2\times 2\log \frac{20}{2} $
$ =9.2cal{{K}^{-1}}mo{{l}^{-1}} $
