Rank the following in order of increasing total vapor pressure: Rank in order of

Question

Rank the following in order of increasing total vapor pressure:

Rank in order of increasing total vapour pressure above the liquid mixture below. Assume that all solutions are ideal (i.e., there is no deviation in vapor pressure by Raoult's law) . The boiling point of methanol (CH3OH) is 65 degree C and the boiling point of methylene chloride (CH2Cl2) is 40 degree C. (1 = lowest total pressure above the liquid mixture; 5 = highest total pressure above the mixture). 1:1 CH2Cl2:CH3OH T= 25 degree C 1:5 CH2Cl2:CH3OH T= 25 degree C 1:1 CH2Cl2:CH3OH T= 50 degree C CH3OH T= 25 degree C

Explanation / Answer

CH2Cl2:CH3OH 1:1 at T=50

CH2Cl2:CH3OH 1:1 at T=25

CH2Cl2:CH3OH 1:5 at T=25

CH3OH at T=25 this is decreasing order of total vapour pressure above liquid mixtures

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