Use the following vapor pressure data to answer the questions. Liquid Vapor pres

Question

Use the following vapor pressure data to answer the questions.

          Liquid                               Vapor pressure, torr                  Temperature, C

A          CH3COCH3                      400                                          39.5

B          C7H16                               400                                            78.0

1.     In which liquid are the intermolecular attractive forces the weakest?    A or B. (2) Which liquid would be expected to have he highest vapor pressure at 58.8 C? A or B

Explanation / Answer

1) weaker the intermolecular force lower the boiling point higher the vapour pressure.

so CH3COCH3 has weakest attractive forces.

2) answer = A = CH3COCH3

as its boiling point is low shows higher vapour pressure.

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