At low pressure the van der Waals' equation is written as .

Options

A. (a)`(PV)/(RT)=[1-a/(RTV)]`
B. (b)`(PV)/(RT)=[1-(RTV)/a]`
C. (c )`(PV)/(RT)=[1+a/(RTV)]`
D. (d)`(PV)/(RT)=[1+(RTV)/a]`

Answer

A

Explanation

Van der Waals equation is:
`[P+a/V_(2)][V-b]=RT`,
At low pressure, volume correction (b) may be neglected. Thus,
` [P+a/V_(2)]V=RT` or `PV+a/V=RT`
or `PV=RT[1-a/(RTV)]`