Question

The entropy change for the transition of ice to liquid water at 273K is 0-022 kJ mol-1 K-1. Calculate the enthalpy change for the transition.
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Answer 1

Answer:

The transition under consideration is:

H 2 O(l)⟶H

2 O(g)

We know that, ΔS

vapour

= TΔH

vapour

given, ΔH

vapour

=40.8kJmol −1

=40.8×1000Jmol

−1T=373KThus ΔS

vapour = 37340.8×1000

=109.38JK −1 mol −1