- #1
DottZakapa
- 239
- 17
- Homework Statement
- Calculate the vapour pressure at 21.0°C of an ideal solution of water and methanol (CH3OH, P°=100 mmHg at 21.0°C) that contains 9.0 mol of water and 0,50 mol of methanol. Vapour pressure of water at 21.0°C is 18.7mmHg.
- Relevant Equations
- Solutions
Isn't the formula to be applied ##P= \chi_{solvent}P^o _{solvent}##?
in which ##P^o _{solvent}##= 18.7mmHg and
##\chi_{solvent}= \frac{mol_{solvent}}{mol_{solvent}+mol_{solute}}=\frac{9.0 mol}{9.0 mol+0,50 mol}##
but seems doesn't leads to the expected result
in which ##P^o _{solvent}##= 18.7mmHg and
##\chi_{solvent}= \frac{mol_{solvent}}{mol_{solvent}+mol_{solute}}=\frac{9.0 mol}{9.0 mol+0,50 mol}##
but seems doesn't leads to the expected result