Q83 · CSIR-NET Chemistry, June 2019

Paper: CSIR-NET June 2019 · Subject: Physical Chemistry · Chapter: Thermodynamics · Topic: Laws State Functions · Marks: 2 · Difficulty: Medium

One mole of a mono-atomic ideal gas is transformed from 300 K and 2 atm to 600 K and 4 atm . The entropy change for this process is

(a)3/2 R ln 2

(b)1/2 R ln 2

(c)$7 / 2 \mathrm{R} \ln 2$

(d)5/2 R ln 2 10

Answer

Answer: A ✓ checked by 4AB · confidence high

Explanation

ΔS = C_p ln(T₂/T₁) − R ln(p₂/p₁) = (5/2)R ln 2 − R ln 2 = (3/2)R ln 2.

Study loop for Thermodynamics