Chapter 12, Problem 12.107QP

Interpretation Introduction

Interpretation:

The reason for reduction in cooking time when pressure cooker is used has to be described.

Concept Introduction:

When water boils, the molecules are evaporated called water vapor.  When water is boiled in a closed container the water vapor here is known as steam.  The energy required to convert steam to vapor is higher than the energy required converting water to steam.  Accordingly steam has high heat of vaporization than boiling water that it releases more heat energy when condenses to liquid water.