Question

Why is isomerization endothermic?

Answer 1

Because isomerization involves the rearrangement (i.e. the breaking) of bonds..........

Explanation:

Formation of bonds involves the release of energy; conversely, the breaking of bonds REQUIRES energy. Because an isomer is a different arrangement of atoms with respect to a given formula, an isomerization process should be energy neutral to a first approx: i.e. bonds formed are equivalent to bonds broken.

However, we have to put energy into the system to activate the initial isomer BEFORE it undergoes isomerization, and thus the process should be endothermic...........