The reason to put the hailstones in a tightly sealed plastic bag inside the freezer compartment of a frost-free refrigerator has to be explained. Concept introduction: Sublimation: The process of direct change of a solid phase into a gaseous phase without any intermediate phase is called sublimation. Working of a frost-free refrigerator: A frost-free refrigerator means instead of cooling coil electric fans are fixed with blowing the cold air into the compartments.

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Chapter 9, Problem 42QRT

Interpretation Introduction

Interpretation:

The reason to put the hailstones in a tightly sealed plastic bag inside the freezer compartment of a frost-free refrigerator has to be explained.

Concept introduction:

Sublimation:

The process of direct change of a solid phase into a gaseous phase without any intermediate phase is called sublimation.

Working of a frost-free refrigerator:

A frost-free refrigerator means instead of cooling coil electric fans are fixed with blowing the cold air into the compartments.

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