Question

For $H_2$ gas, the compressibility factor , $Z=\frac{PV}{nRT}$ is:

• A. equal to 1
• B. equal to 0
• C. always greater than 1
• D. initially less than 1 and then becomes greater than 1 at high pressures

Answer 1

Answer: (C)

always greater than 1

For $H_2$ compressibility factor is always greater than 1.
This is observed because the gases like hydrogen show intermolecular repulsive forces which cause the actual volumes to be greater than the ideal values.
Hence option $C$ is correct answer.