Manipal MET2012ChemistryThermodynamics (C)
One mole of ice is converted into water at 273 K . The entropies of H ₂ O (s) and H ₂ O (t) are 38.20 and 60.01 ~J ~mol ⁻¹ ~K ⁻¹ respectively. The enthalpy change for the conversion is
Options
- A3 ~kJ ~mol ⁻¹
- B4 ~kJ ~mol ⁻¹
- C5 ~kJ ~mol ⁻¹
- D6 ~kJ ~mol ⁻¹
Correct answer
D. 6 ~kJ ~mol ⁻¹
Step-by-step solution
G= H-T S At equilibrium, G=0 aligned H & =T S H & =273 (60.01-38.20) & =5954.13 ~J ~mol ⁻¹=5.954 ~kJ ~mol ⁻¹ & 6 ~kJ ~mol ⁻¹ aligned