Question

For non-zero value of force of attraction between gas molecules for large volume, gas equation will be :

• A. $PV=nRT-\frac{n^{2}a}{V}$
• B. $PV=nRT+nbP$
• C. $P=\frac{nRT}{V-b}$
• D. $PV=nRT$

Answer 1

The correct option is A $PV=nRT-\frac{n^{2}a}{V}$

For non-zero value of force of attraction between gas molecules for large volume, gas equation will be $PV=nRT-\frac{n^{2}a}{V}$
Here, a correction term $\frac{a{n}^2}{V^2}$ is added to pressure.
It is a correction for the intermolecular attractions.
Thus, the pressure is corrected as $P_{ideal}=P_{real}+\frac{a{n}^2}{V^2}$.