Читать книгу Fundamentals of Heat Engines - Jamil Ghojel - Страница 42

If a gas mixture of two components A and B is at pressure p and temperature T in a container with volume V, each gas in the mixture exists separately and independently at the temperature and volume of the mixture, and their respective pressures are p_A and p_B. For the mixture

For the components,

Since n = n_A + n_B,

or

(1.45)

p_A and p_B are known as the partial pressures.

Therefore,

It can be shown that the internal energy and enthalpy of a mixture of two gases (A and B) can be written as

The gas constants for the ith component and gas mixture are, respectively,

Using Eq. (1.43), we obtain

(1.46)

For the two‐gas mixture