Chapter 6, Problem 9Q

Interpretation Introduction

Interpretation:

Method to prepare freeze-dried food should be explained.

Concept introduction:

Sublimation is the conversion of a solid phase of a substance to the vapor phase and the vice-versa is known as a deposition. The amount of heat required for this conversion is known as heat of sublimation $\left(\Delta H_{\text{sub}}\right)$. The conversion is as follows:

  $\text{Gas}\underset{\text{Deposition}}{\overset{\text{Sublimation}}{\rightleftarrows }}\text{Solid}$