Question

Explain the energy changes that occur when the following reaction happens:

H2 + Cl2 → 2HCl

A. Energy is absorbed when the HCl bonds form.

B. Energy is needed to break the bonds of H-H in H2 and Cl-Cl in Cl2

C. Energy is released when the bonds of H-H in H2 and Cl-Cl in Cl2 break.

D. Energy is released when the H-Cl bonds form.

E. No energy changes occur when this reaction happens.

Answer 1

B

Step-by-step explanation:

H2 + Cl2 → 2HCl

Hmm redox reaction.

Energy is needed to break the bonds of H-H in H2 and Cl-Cl in Cl2