Heptane and Octane form an ideal solution at 373 K. The vapour pressures of the pure liquids at this temperature are 105.2 K Pa and 46.8 K Pa respectively. If the solution contains 25 g of heptane and 28.5 g of octane, calculate
(i) Vapour pressure exerted by heptane.
(ii) Vapour pressure exerted by solution.
(iii) Mole fraction of octane in the vapour phase.
Components A (Heptane, )
Components of B
No. of moles of heptane,
No. of moles of octane,
Total moles in solution,
(i) Vapour pressure exerted by heptane
where is mole fraction of component A
(ii) Vapour pressure of octane
Total vapour pressure of solution
(iii) Mole fraction of octane
