Values of the virial coefficients B and C at a fixed temperature can be obtained from experimental PV T data by noting that

a. Using these formulas, show that the van der Waals equation leads to the following expressions for the virial coefficients.

b. The temperature at which 

where T_c is the critical temperature of the van der Waals fluid given by Eqs. 6.6-3. (For many real gases T_Boyle is approximately 2.5T_c!)

Eqs. 6.6-3.

Transcribed Image Text:

lim P-0 (V-x) P-0 (V→∞) PV RT lim V lim P-0 (V→∞0) PV - (RY - 1) = RT = 1 V² PV RT -1 = B B -³) = c V