試題詳解

A. The following plot shows a vapor pressure of various solutions of components A and B at some temperature.

 Which of the following statements is false concerning solutions of A and B? If it is false, correct it. (6%)
(A)The solutions exhibit negative deviations from Raoult's law.
(B)ΔH_soln for the solutions should be endothermic.
(C)The intermolecular forces are weaker in solution than in either pure A or pure B.
(D) Pure liquid B is more volatile than pure liquid A.
(E)The solution with x = 0.6 will have a lower boiling point than either pure A or pure B.