Chem again sorry
posted by Dina on .
A solution of sodium chloride in water has a vapor pressure of 18.3 torr at 25°C. What is the mole fraction of NaCl in this solution?
What would be the vapor pressure of this solution at 45°C? The vapor pressure of pure water is 23.8 torr at 25°C and 71.9 torr at 45°C.
delta Psolution = Xsolute*Posolvent
Look up vp H2O at 25 C, that is Po.
Take the difference between that and 18.3 to obtain delta P.