[Pw_forum] About the relationship between enthalpy and pressure.

Stefano de Gironcoli degironc at sissa.it
Sat Dec 25 03:10:52 CET 2010

Pressure is the thermodynamical variable upon which enthalpy depends

If you know  E(V) you can define H(P) = min_V ( E(V) + P V )

Have a look in a book of thermodynamics.


Hongsheng Zhao wrote:
> Dear PWSCF users,
> We all know that, the pressure-Volume, and energy--Volume curve can be obtained by fitting of EOS.  But what's the relationship between enthalpy and pressure?  
> Best regards.
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