Chapter 5, Problem 27QP

Interpretation Introduction

Interpretation:

The heat released per gram of zinc sulfide roasted in the given reaction is to be calculated.

Concept Introduction:

Sign of enthalpy change depends upon the heat change of the system. If the system involves absorption of heat, then the sign of enthalpy change is positive, and if the system involves release of heat, then the sign of enthalpy change is negative.

The enthalpy change associated per gram of compound is calculated by the formula,

$\text{Enthalpy}\text{change}\text{per}\text{gram}\text{of}\text{compound}=\frac{\text{Enthalpy}\text{change}\text{per}\text{mol}\text{of}\text{Compound}}{\text{Molar}\text{mass}\text{of}\text{Compound}}$