4. Energetics

Bond Enthalpies — Quiz

Test your understanding of bond enthalpies with 5 practice questions.

Practice Questions

Question 1

Estimate the enthalpy change $\Delta H$ for the reaction $\mathrm{CH_3OH + HCl -> CH_3Cl + H_2O}$ using average bond enthalpies: O–H:463, C–O:358, C–H:412, H–Cl:431, C–Cl:338 kJ/mol.

Question 2

Which equation correctly expresses the reaction enthalpy $\Delta H$ using average bond enthalpies?

Question 3

Average bond enthalpy estimations are least accurate for reactions involving which of the following?

Question 4

What is the typical uncertainty (per mole) associated with reaction enthalpies estimated using average bond enthalpies?

Question 5

Estimate the enthalpy change $\Delta H$ for the reaction $\mathrm{C_2H_6 + Br_2 -> C_2H_5Br + HBr}$ using average bond enthalpies: C–C:347, C–H:412, Br–Br:193, C–Br:276, H–Br:366 kJ/mol.