Polymerization and Depolymerization for Exothermic/endothermic cycle to cool my refridgerator and heat my shower

An exothermic/endothermic cycle that chills my refrigerator and heats my hot water.

Replace freon or modern alternate gas/liquid change state with a more energy dense material. Using a polymerization process that quickly generates temperatures sufficient to boil water makes it practical for a refrigeration/water heating cycle for household and commercial uses. The ion charged catalyst switch minimizes the energy input into the system.

By using solution polymerization, you get heat
https://en.wikipedia.org/wiki/Superabsorbent_polymer
And by degrading the polymer into monomer it is endothermic. Where normally this requires significant energy inputs for minimal endothermic effect, the catalyst minimizes the energy input.
https://en.wikipedia.org/wiki/Thermal_depolymerization

Think of it as a solid to gas version of the Sterling engine.
https://en.wikipedia.org/wiki/Stirling_engine

Or just get a better refrigerator using a scroll compressor and capture the heat output, if you find that easier.