Chapter 12, Problem 144SAE

Interpretation Introduction

Interpretation:

The phenomena in mentioned figure needs to be discussed. The change in the phenomena if the initial amount of liquid decreases and increases needs to be explained.

Concept introduction:

When a liquid in an open container is heated, at a certain point temperature becomes constant and liquid starts to boil. Equilibrium between liquid and vapor phase is formed and rate of vaporization and rate of condensation become equal. But in a closed container, boiling does not occur. Instead temperature and pressure increases gradually. If there’s a correct amount of liquid present, the pressure may increase higher than the atmospheric pressure. Normally up to a certain point interface between liquid and vapor phase is observable. But after a point called critical point, this interface becomes indistinguishable.