LECTURE PHYSICAL CHEMISTRY 3rd EDITION ROBERT G. MORTIMER

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If the enthalpy change of a particular substance is not
known. We have a modified version of the Clausius–
Clapeyron equation can be derived using the
assumption that ∆C P,m is constant:
5.4. The Gibbs Energy and Phase Transitions
We ask the following question: Why is water a liquid
with a molar volume of 18mLmol −1 at 1atm and 373.14
K, but a vapor with a molar volume of 30 L mol −1 at
1atm and 373.16K? Why should such a small change in
temperature make such a large change in structure?
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