JEE Main2011ChemistryThermodynamics (C)Actual
The entropy change involved in the isothermal reversible expansion of 2 moles of an ideal gas from a volume of 10 dm ^3 to a volume of 100 dm ^3 at 27^ C is :
Options
- A35.8 ~J ~mol ⁻¹ ~K ⁻¹
- B32.3 ~J ~mol ⁻¹ ~K ⁻¹
- C42.3 ~J ~mol ⁻¹ ~K ⁻¹
- D38.3 ~J ~mol ⁻¹ ~K ⁻¹
Correct answer
D. 38.3 ~J ~mol ⁻¹ ~K ⁻¹
Step-by-step solution
For an ideal gas, for isothermal reversible process, aligned & S=2.303 nR ( v ₂ v ₁ ) & =2.303 2 8.314 ( 100 10 ) & =38.3 ~J ~mol ⁻¹ k ⁻¹ aligned