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Question

Question: The compressibility factor for a real gas at high pressure is :...

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

A

1 + RT/pb

B

1

C

1 + pb /RT

D

1 –pb/RT

Answer

1 + pb /RT

Explanation

Solution

(P+aV2)(Vb)=RT\left( P + \frac{a}{V^{2}} \right)(V - b) = RT

at high pressure can be neglected.

PV – Pb = RT

PV = RT + Pb

PVRT\frac{PV}{RT} = 1 +PbRT\frac{Pb}{RT}

Z =1 + PbRT\frac{Pb}{RT} ; Z > 1 at high pressure