Discussion Forum



1)

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

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A) real gas , $N_{2},CO_{2}$

B) ideal gas, $H_{2},CO_{2}$

C) ideal gas, $CO_{2}, H_{2},$

D) real gas , $H_{2},CO_{2}$

Answer:

Option B

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.

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