Question

The pressure exerted by real gas is :

• A. Lower than ideal gas
• B. More than ideal gas
• C. Equal to ideal gas
• D. Can't be calculated.

Answer 1

The correct option is B More than ideal gas

The pressure exerted by real gas is more than ideal gas this is increase in pressure for a real gas is introduced as correction constant in Vanderwaal's equation of state.

$(P+\frac{{an}^2}{V^2})(V-nb)=RT$

$\Rightarrow$ ideal pressure $=P$

$\Rightarrow$ real pressure $=P+\frac{{an}^2}{V^2}$