The compressibility factor for a real gas at high pressure is .

Options

A. `1`
B. `1 + Pb//RT`
C. `1-Pb//RT`
D. `1+RT//Pb`.

Answer

B

Explanation

For real gases,
`(P + (a)/(V^(2))) (V-b) = RT`
Under high pressure, `P gtgtgt a//V^(2)`
`:. P(V-b) = RT` or `PV = RT + Pb`
or `(PV)/(RT) = (RT)/(RT) + (Pb)/(RT)`
or `Z = 1 + (Pb)/(RT)`