Given the enthalpy changes for the formation of compounds A and B, explain how you would construct an enthalpy cycle to find the enthalpy change for the reaction between A and B to form product C.

To construct the enthalpy cycle, I would start with the formation of A and B from their elements, which have known enthalpy changes. Then, I would include the reaction of A and B to form C. By applying Hess's law, I can sum the enthalpy changes of the formation of A and B and subtract the enthalpy change for the formation of C to find the desired enthalpy change for the reaction.

This answer effectively demonstrates the process of constructing an enthalpy cycle using known enthalpy changes. It shows the student's ability to apply Hess's law in a practical context, which is crucial for understanding thermodynamics in chemistry.