Chapter 6, Problem 6.21QP

Interpretation Introduction

Interpretation: Enthalpy and Enthalpy of reaction has to be defined and the condition at which heat and enthalpy of reaction are equal has to be given.

Concept Introduction:

At constant pressure, the exchange of heat between the system and surroundings is called as Enthalpy and its state function.

Enthalpy can be given by the formula,

$\text{H=U+PV}$

Where, H=enthalpy

U=internal energy

P=Pressure

V=Volume

For a reaction, enthalpy can either be positive or negative depending on the process.