Question

The vapor pressure of a liquid increases linearly with increasing temperature?

(a) True

(b) False

(c) Can't say

(d) None

Solution

Vapor pressure increases non-linearly according to the Clausius- Clapeyron Equation.

rArr  lnP = lnC - (DeltaH_(vap))/(RT)

And  ln(P_2/P_1) = ((DeltaH_(vap))/R)(1/T_1-1/T_2)

P_2 is the vapour pressure at temperature T_2

P_1 is the vapour pressure at temperature T_1

Therefore option (b) is correct.