Chapter 9, Problem 71E

Interpretation Introduction

Interpretation: The meaning of standard enthalpy of formation needs to be explained and separate reactions for the formation of ${\text{NaCl, H}}_{\text{2}}{\text{O, C}}_{\text{6}}{\text{H}}_{\text{12}}{\text{O}}_{\text{6}}$ and ${\text{PbSO}}_4$ needs to be determined.

Concept Introduction: The change in enthalpy during formation of one mole of a substance from its pure elements in the standard state i.e. at temperature 298.15 K and pressure 1 atm is known as standard enthalpy of formation.