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Manipal MET2018ChemistryThermodynamics (C)

The enthalpy change for the transition of liquid water to steam is 40.8 ~kJ ~mol ⁻¹ at 373 K . Calculate the entropy of vaporisation of water.

Options

  1. A109.4 JK ⁻¹ ~mol ⁻¹
  2. B10.94 JK ⁻¹ ~mol ⁻¹
  3. C1.094 JK ⁻¹ ~mol ⁻¹
  4. D1009.4 JK ⁻¹ ~mol ⁻¹

Correct answer

A. 109.4 JK ⁻¹ ~mol ⁻¹

Step-by-step solution

aligned & S_ vap = H_ vap T & H_ vap =40.8 ~kJ ~mol ⁻¹, T=373 ~K & S_ vap = 40.8 10^3 373 =109.4 JK ⁻¹ ~mol ⁻¹ aligned

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