State Raoult's law for a solution containing volatile components. How does Raoult's law become a special case of Henry's law?

(a). According to Raoult's law, vapour pressure of a component is directly proportional to its mole fraction at a particular temperature. Pa = PoaXa So, Pb = PobXb Ptotal = PoaXa + PobXb In Henry's law, mole fraction of a gas at a particular temperature is proportional to the pressure exerted over the gas. Pgas = kXgas So, we can say that for volatile substance it is a special case of Henry's law (b). ΔTf = Kfm = ΔTf = Kf × WbMb × 1000Wa 0.40 = 5.12 × 1Mb × 100050 Mb = 256 g/mol