Question

2 mole of ideal gas at 27ºC temp. is expanded reversibly from 2 lit. to 20 lit. Find entropy change (R = 2 cal/mol K)

• A. 92.1
• B. 0
• C. 4
• D. 9.2

Answer 1

Answer: (D)

9.2

Answer 2

The correct option is (D) : 9.2

ΔS (Entropy change) = 2.303 n R log10V2V1 ​=2.303×2×2×log10 $\frac{}{}\frac{20}{2}$ ​=2.303×2×2×1 =9.212cal