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Question

The compressiblity factor for a real gas at high pressure is: 


A
1+RTPb
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B
1
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C
1+PbRT
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D
1PbRT
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Solution

The correct option is A 1+PbRT
The van der Waals' equation is given as 
(P+aV2)(Vb)=RT  (for 1 mol of gas)

At high pressure, aV2 term  can be neglected, since P is large.

PVPb=RT 
or   PV=RT+Pb

PVRT=1+PbRT

Z=1+PbRT

Chemistry

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