Chapter 4, Problem 4.6P

Interpretation Introduction

Interpretation:

The frost will whether sublime has to be predicted and the partial pressure of water which would ensure that the frost remains has to be given.

Concept introduction:

The process of sublimation occurs when the vapor pressure of a particular substance is greater in the solid form in comparison to its liquid form. The frost will sublime when the vapor pressure at the given temperature is higher than the partial pressure of water in the atmosphere.

Clausius-Clapyron equation,

$\text{ln}\frac{{\text{P}}_{\text{2}}}{{\text{P}}_{\text{1}}}\text{=}\frac{{\text{ΔH}}_{\text{vap}}}{\text{R}}\left(\frac{\text{1}}{{\text{T}}_{\text{2}}}\text{-}\frac{\text{1}}{{\text{T}}_{\text{1}}}\right)\boxed{\begin{array}{l}\text{where,}\\ {\text{ΔH}}_{\text{vap}}:\text{Enthalpy}\text{of}\text{vaporization}\\ \text{R}:\text{Gas}\text{constant}\\ \text{P}:\text{Pressure}\\ \text{T}:\text{Temperature}\end{array}}$