Chapter 4, Problem 4C.4AST

Interpretation Introduction

Interpretation:

The enthalpy of vaporization of sodium at $25°\text{C}$ has to be determined.

Concept Introduction:

The conversion of solid directly into vapor is referred to as the sublimation.  The molar enthalpy change of a solid which is when converted into vapor is represented by $\Delta H_{\text{sub}}$ and is known as the enthalpy of sublimation.  The enthalpy of sublimation is equal to the sum of enthalpy of fusion and enthalpy of vaporization.  The mathematical expression for $\Delta H_{\text{sub}}$ is shown below.

    $\Delta H_{\text{sub}}=\Delta H_{\text{fus}}+\Delta H_{\text{vap}}$