AIPMT PRELIMS2002Chemistry-Thermodynamics
AIPMT PRELIMS 2002 Chemistry Entropy Change MCQ Question
Type: MCQ-numerical-Medium-Class 11
2 mole of ideal gas at 27°C temp. is expanded reversibly from 2 lit. to 20 lit. Find entropy change (R = 2 cal/mol K) :-
A
92.1
B
0
C
3.4
D
9.2
Correct Answer
Option D
Detailed Explanation
ΔS = nR ln(V₂/V₁) = 2 × 2 × ln(20/2) = 92.1 cal/K.
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