Q.

Which of the following options will have compressibility factor greater than 1 ?

 

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a

 CH4 gas at room temperature and low pressure.

b

He gas at normal temperature and normal pressure.

c

H2 gas at its critical condition.

d

 N2 gas at its Boyle's temperature and low pressure.

 

answer is D.

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Detailed Solution

The real volume of the hydrogen and helium gas is bigger than the volume of an ideal gas as a result of repulsion. As a result, hydrogen and helium have compressibility factors that are higher than one. Therefore, at critical conditions, the compressibility factors of hydrogen and helium are both larger than 1.

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