The bond strength between C and a halogen decreases down the halogen group in the periodic table. Based on this trend, predict which of the following gases has the largest (most negative) enthalpy of atom combination?

Question

Quizplus · Accepted Answer

The enthalpy of atom combination is more negative (larger) for bonds that are stronger. Since the bond strength decreases down the halogen group, the bond between carbon and fluorine (in CF4) is the strongest among the options, leading to the largest (most negative) enthalpy of atom combination.

The Bond Strength Between C and a Halogen Decreases Down