Discussion Forum

The variation of compressibility  factor (Z) with pressure (p in bar)  for some gases are shown in the figure below, Identify  the gases (A),(B) and (C) respectively

Answer:

Explanation:

The extent of deviation shown by real gases from ideal behaviour is measured in terms of compressibility factor (Z)  which is defined as the ratio of pV and nRT.

Mathematically,

              $Z=\frac{pV}{nRT}$

for ideal gases, Z=1

 Easily liquefiable gases such as $CO_{2}$ exhibit larger deviation as compared to gases such as $H_{2}, O_{2},N_{2}$ etc., that liquefy with difficulty.