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Question

The compressibility factor for a gas under critical conditions is:

A
38
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B
83
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C
1
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D
14
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Solution

The correct option is A 38
We know that,
Z=PVRT
Pc,Vc,Tc​ are critical pressure, volume and temperature.
=PCVCRTC
By substituting, Pc=a27b2,Vc=3b,Tc=8a27Rb
=a27b2×3b×1R×27Rb8a=38

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