(Presented in the session of February 6, 1908.)
7. Calculation of quantity H.
In order to express by the variables , we insert the value for from (6) into (13) and obtain
This partial differential equation assumes a simpler form, when the quantities are chosen instead of as independent variables. Namely, shall be the value of entropy again, when the system is adiabatically brought to rest; of course . Thus we think of as being expressed by entropy and volume; if for example
Then it is:
because according to (7), is changed by at adiabatic volume change. If we furthermore introduce the variable
instead of ,
- Compare these proceedings, CXVI, p. 1391 (1907).