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01/10/2021 10:56 am
Topic starter
2 moles of an ideal gas at 27ºC temperature is expanded reversibly from 2 L to 20 L. Find entropy change (R = 2 cal/mol K)
(a) 92.1
(b) 0
(c) 4
(d) 9.2
1 Answer
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01/10/2021 10:59 am
Correct answer: (d) 9.2
Explanation:
Entropy change at constant temperature
= 2.303 nR log \(\frac{V_1}{V_2}\)
= 2.303 x 2 x 2 log \(\frac{20}{2}\)
= 9.2 cal K-1 mol-1