Chapter 18, Problem 51E

Interpretation Introduction

Interpretation:

The enthalpy change (ΔH) for the reaction of hydrazine with fluorine gas needs to be deduced from bond energies.

Concept Introduction:

The enthalpy change, ΔH for a reaction is essentially the heat flow of the reaction taking place at constant pressure.

The change in enthalpy for a given reaction can be deduced from the difference in the total number of bonds that are broken (reactants) and the total number of bonds formed (products).

  $\text{ΔH =}{\displaystyle \sum \text{Bonds broken}}-{\displaystyle \sum \text{Bonds fromed}}\text{ ------(1)}$