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 , N2,CO2

B) ideal gas, H2,CO2

C) ideal gas, CO2,H2,

D) real gas , H2,CO2

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=pVnRT

for ideal gases, Z=1

 

 Easily liquefiable gases such as CO2 exhibit larger deviation as compared to gases such as H2,O2,N2 etc., that liquefy with difficulty.

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