Chapter 4, Problem 45QRT

Interpretation Introduction

Interpretation:

The given reaction has to be identified that it belongs to exothermic or endothermic.

Concept Introduction:

Energy: It is the capacity or ability to do work. Joule (J) is the SI unit of energy.

Enthalpy H is the amount energy absorbed or released in a process.

$\text{Enthalpy}H=U+PV$

Where,

$\text{U}$ is the internal energy

$\text{P}$ is the pressure

$\text{V}$ is the volume

Exothermic reaction: Exothermic reactions are those in which evolution of heat takes place during chemical reaction.

Endothermic reaction: Endothermic reactions are chemical reactions in which heat is absorbed during chemical reaction. In such type of reactions, external energy is needed.