Which of the following compounds would have the largest enthalpy of formation? The bond energies are given in parentheses.

Question

Quizplus · Accepted Answer

The enthalpy of formation (∆Hf) for a compound is the enthalpy change associated with forming one mole of the compound from its elemental components in their standard states. The enthalpy change can be calculated using the bond energies of the chemical bonds involved in the reaction.
The larger the bond energy, the more stable the bond, and the greater the energy required to break it. The HF bond has a bond energy of 567 kJ/mol, which is the largest bond energy out of all the given compounds. Hence, the enthalpy of formation for compound D, which has the most number of HF bonds, will be the largest.

Which of the Following Compounds Would Have the Largest Enthalpy