Page:Zur Thermodynamik bewegter Systeme (Fortsetzung).djvu/1

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(Presented in the session of February 6, 1908.)[1]

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 ,

  1. Compare these proceedings, CXVI, p. 1391 (1907).