ΔSvap  of acetone CH3−CO−CH3 is 0.09kJ mol-1 K-1. If BP of acetone is 56°C (329 K), calculate the heat required for vaporization of 1 g of acetone.

Given that,    ΔSvap  of acetone =0.093kJ−1mole−1K−1    =93JK−1mol−1    Tb=329K∴     ΔHvap=TbΔSvap=329×93=30597Jmol−1Now, heat required for vaporization of 58 g acetone = 30597 J∴ Heat required for vaporization of 1g acetone =30597×158