A solution contains naphthalene(C10H8) dissolved in hexane (C6H14) at a concentration of 14.52 % naphthalene by mass.Calculate the vapor pressure at 25 degrees C of hexane above the solution. The vapor pressure of pure hexane at 25 degrees C is 151 .

Answer 1

P_solution = X_hexane*P^o_hexane

14.52% by mass = 14.52g naphthalene dissolved in 14.52 g naphthalene+85.48 g hexane.
Convert 14.52 g naphthalene to moles.
Convert 85.48 g hexane to moles.
mole fraction hexane = moles hexane/total moles.

Answer 2

139.9