Читать книгу Geochemistry - William M. White - Страница 64

From eqn. 2.68, we can see that the temperature derivative of enthalpy is simply the isobaric heat capacity:

and hence:

(2.111)

Thus, the change in enthalpy over some temperature interval may be found as:

(2.112)

C_p is often a complex function of temperature, so the integration is essential. Example 2.4 illustrates how this is done.