Question

Calculate the vapour pressure of a solution prepared by mixing 349.5 gm of component A (Mol. Mass 134) and 416.8 gm of component B (Mol. Mass 169) at 298 K. Vapour pressures of pure components A and B are 421mm Hg and 562mm Hg respectively. Also calculate mole fraction of A and B in vapour phase.

Answer 1

We can calculate mole fraction of components in gas phase

As shown above component B is more volatile than component A and vapour phase is richer in component B