NEET2011ChemistryThermodynamics (C)Actual
If the enthalpy change for the transition of liquid water to steam is 30 ~kJ ~mol ⁻¹ at 27^ C , the entropy change for the process would be
Options
- A1.0 ~J ~mol ⁻¹ ~K ⁻¹
- B0.1 ~J ~mol ⁻¹ ~K ⁻¹
- C100 ~J ~mol ⁻¹ ~K ⁻¹
- D10 ~J ~mol ⁻¹ ~K ⁻¹
Correct answer
C. 100 ~J ~mol ⁻¹ ~K ⁻¹
Step-by-step solution
aligned & G^ = H^ -T S^ & Given, H_ vap. =30 ~kJ ~mol ⁻¹ & G^ =0 at equilibrium, & S_ vap = H_ vap T & = 30 10^3 ~J ~mol ⁻¹ 300 ~K & =100 ~J ~mol ⁻¹ ~K ⁻¹ & aligned