Chapter 7.11, Problem 3QQ

Interpretation Introduction

Interpretation:

Among the given statements, the correct one for vapor pressure is the pressure exerted by a vapor above a liquid has to be chosen.

Concept Introduction:

Evaporation is a process in which the molecules escapes from the liquid phase to the gas phase.  According to Kinetic molecular theory an evaporation can be explained as, not all the molecules present in a liquid or solid or gas possess the same the same kinetic energy and at any instant, some of the molecules may have above average kinetic energies and other may have below average kinetic energies as a result of collision between molecules. The molecules overcome attractive forces with other molecules.

Vapor pressure is a pressure which is exerted by a vapor above a liquid when the liquid and vapor are in physical equilibrium with one to each other.