A solution is made by mixing 55.9 g acetone (CH 3 COCH 3 ) and 55.9 g methanol (CH 3 OH). What is the vapor pressure of this solution at 25°C? What is the composition of the vapor expressed as a mole fraction? Assume ideal solution and gas behavior. (At 25°C the vapor pressures of pure acetone and pure methanol are 271 and 143 torr, respectively.) The actual vapor pressure of this solution is 161 torr. Explain any discrepancies. P Ideal =? Xv acetone=? Xvmethanol=?
A solution is made by mixing 55.9 g acetone (CH 3 COCH 3 ) and 55.9 g methanol (CH 3 OH). What is the vapor pressure of this solution at 25°C? What is the composition of the vapor expressed as a mole fraction? Assume ideal solution and gas behavior. (At 25°C the vapor pressures of pure acetone and pure methanol are 271 and 143 torr, respectively.) The actual vapor pressure of this solution is 161 torr. Explain any discrepancies.
P Ideal =?
Xv acetone=?
Xvmethanol=?
The actual vapor pressure of the solution (161 torr) is _________(equal to, less than, or greater than?) the calculated pressure assuming ideal behavior. Therefore, the solution exhibits _________ (negative, no, or positive?) deviations from Raoult's law. This occurs when the solute-solvent interactions are _________(stronger or weaker?) than in pure solute and pure solvent.
- Dalton's law of partial pressure:- This law states that total pressure of the mixture of gases present in a system is the equal to the sum of the partial pressure of the gases present in the system.
that is (i.e.),
- Mole fraction(X):- It is the ratio of number of moles of specific gas and the total number of moles of mixture of gases present in the system.
- Molecular weight of Methanol(CH3OH)=32.04g/mol
- Molecular weight of Acetone(CH3COCH3 )=58.08g/mol
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