The solubility of urea in methanol is 17g urea/ 100ml methanol.Density of methanol is 0.792 g/ml at 293k at which vapour pressure of methanol is 96.0mmHg.Thus vapour pressure of saturated solution of urea in methanol is

Wt. of urea = 17gvol. of methanol = 100mlDensity of methanol = 0.792g/mlWeight of methanol = 79.2gVP of CH3OH = 96mm of HgVP of sol. of urea in CH3OH =?For a dilute sol.                                                      P = 96 - 9.85 =86.15mm of Hg