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At low pressure, the van der Waals equat...

At low pressure, the van der Waals equation is reduced to

A

`Z =(pV_(m))/(RT )=1-(ap)/(RT)`

B

`Z =(pV_(m))/(RT )=1+(b)/(RT)p`

C

`pV_(m)= RT`

D

`Z =(pV_(m))/(RT )=1-(a)/(RT)`

Text Solution

Verified by Experts

The correct Answer is:
A
When pressure is low
`[P +(a)/(V^(2))](V-b)=RT`
or `PV =RT -(a)/(V)+(ab)/(V^(2))` or `(PV)/(RT) =1-(a)/(VRT)`
`Z= - (a)/(VRT) ( :' (PV)/(RT) = Z )`
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