Chapter 1, Problem 1.81SP

Interpretation Introduction

Interpretation:

Grams of sodium and chlorine required to release energy of $171\text{kcal}$ is to be determined.

Concept introduction:

When a chemical reaction occurs, it follows certain laws known as law of chemical combination. An important law of chemical combination is law of chemical conservation. Law of chemical conservation states that mass can neither be created nor be destroyed, it only changes its form. Mass lost if any in a reaction appears as energy in form of heat.

Chemical reactions in which heat is released with product formation is called exothermic reactions. Similarly, a chemical reaction in which heat is employed in product formation is called endothermic reaction.