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) : -

Answer 1

Answer:

9.212 cal/K

Explanation:

n = 2 moles ; v1 = 2 L ; v2 = 20 L

ΔS = nR × 2.303㏒ (v2/v1) cal/K

     = 2×2×2.303×㏒(20/2) cal/K

     = 9.212 × ㏒10  cal/K

     = 9.212 cal/K