Question

What is the compressibility factor for $H_2$ which behaves as a real gas?

• A. 1
• B. $1-\frac{a}{RTV}$
• C. $1+\frac{Pb}{RT}$
• D. $\frac{RTV}{1-a}$

Answer 1

The correct option is C

$1+\frac{Pb}{RT}$

For $H_2$ , attractive forces are neglected, hence

$\frac{a}{V^2}=0$

$\therefore P⟮V-b⟯=RT$

$PV=RT+Pb$

$\therefore \frac{PV}{RT}=⟮1+\frac{Pb}{RT}⟯=Z$