LECTURE PHYSICAL CHEMISTRY 3rd EDITION ROBERT G. MORTIMER

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Entropy Changes for Processes That Begin
and End at the Same Temperature
If a process is not isothermal but has a final
temperature that is equal to its initial
temperature, we can calculate ∆S for the
process by integrating dq rev /T on a reversible
isothermal path. The actual process does not
have to be reversible or isothermal, but the
initial and final states must be equilibrium
states at the same temperature.
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