Lesson: Hess Cycles Using Enthalpies of Formation Chemistry • 10th Grade

In this lesson, we will learn how to calculate reaction enthalpies by comparing the standard enthalpies of formation of the reactants and the products.

Lesson Playlist

05:48

Lesson Worksheet

Q1:

Using the data below, calculate to 3 significant figures the standard molar enthalpy of combustion of diborane .

Q2:

Using the data in the table, calculate, to the nearest kilojoules per mole, the standard enthalpy of combustion of hydrazine . One of the products of the reaction is nitrogen.

Q3:

Using the data in the table, calculate, to the nearest kilojoules per mole, the standard enthalpy of combustion of methane.