A certain gas obeys P(Vm-b)=RT. The value of∂Z∂PTis xbRT. The value of xis_________.
Answer: 1
From Van der Waals equation,
P(Vm-b)=RTP=PressureVm=molarvolumeofgasT=TemparatureR=UniversalgasconstantP(Vm-pb)=RTPVmRT=1+pbRT∂Z∂P=0+bRT(Z=Compressibilityfactor)∵bRT=xbRT∴x=1