Question

Which of the following measure the deviation from ideal behaviour gas?

• A. Collision diameter
• B. Collision frequency
• C. Compressibility factor
• D. van der Waals' constant ${}^{\prime }{a}^{\prime }$

Answer 1

The correct option is C Compressibility factor

The compressibility factor measures the deviation from ideal behavior gas.

Compressibility factor $Z=\frac{PV}{nRT}$

$Z=1$ indicates ideal behaviour.

$Z>1$ indicates a positive deviation from ideal behaviour. The gas is less compressible.

$Z<1$ indicates a negative deviation from ideal behaviour. The gas is more compressible.