Question

1. Boiling point of a liquid mixture depends on the following property?

         a) electronegativity

         b) material of the container

         c) size of the container

         d) vapor pressure

2. The sum of partial pressure is equal to the total pressure is likely from this scientist.

         b) Francois-Marie Raoult

         c) Jacques Charles

         d) Robert Boyle

3. What type of distillation should be used for a liquid mixture with a b.p. difference of greater than 200° C?

         a) fractional distillation

         b)simple distillation

         c) vacuum distillation

         d)steam distillation

Answer 1

Q1

Vapor pressure only, all other are not relevant, and plenty are mostly physcal changes, not vapor-liquid equilbirium one

Q2

Ptotal = Pgases

this must be Robert Boyle, since he studied pressure/volume relationships

eventually, he understood and showed that each gas occupies their respective pressure, according to amount of substance

Q3

If T > 200°C

avoid simlpe distillation, since it is too high for the point

Therefore, use steam distillation, since steam can achieve high temperatures