If Z is a compressibility factor, Ven der Waals equation at low pressu

1.	If Z is a compressibility factor, Ven der Waals equation at low pressure can be written as :
Answer» `Z=1-(PB)/(RT)` `Z=1+(Pb)/(RT)` `Z=1+(RT)/(Pb)` `Z=1-(a)/(VRT)` Solution :Compressive fasctor `(Z)=(PV)/(RT)` (1 mole REAL GAS) van der Waal.s equation `(P+(a)/(V^(2))) (V-b)=RT` At lower pressure `V-b ~~V` `(P+(a)/(V^(2)))V=RT` `therefore PV+(a)/(V)=RT` `therefore PV=RT-(a)/(V)` `therefore (PV)/(RT)=1-(a)/(VRT) ""` (`because` Dividing by RT on both side) `therefore Z=1-(a)/(VRT)`

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