Chapter U5.5, Problem 10E

Interpretation Introduction

Interpretation:

Farmers spray water on oranges to protect them from frost, reason behind this needs to be explained.

Concept Introduction :

The latent heat of vaporization is also recognized as the enthalpy of evaporation or vaporization. It is the amount of energy which must be added to a liquid substance, to alter a given amount of the substance into a gas.

Answer to Problem 10E

To preserve oranges from freezing.

Explanation of Solution

When an orange farm is forecasted for freezing, the farmers usually sprays water to the trees. When there is a drop in temperature, this water freezes and heat is released into the environment.

This is quite enough heat to keep the fruit preserved from freezing. Thus, causing an ice to form on the oranges actually saves them from freezing.