if heat is energy, then why can’t air conditioners use that energy?

Question

if heat is energy, then why can’t air conditioners use that energy?

In: 1

Answer 1

air conditioners run on electricity, and machinery necessary to turn heat into electricity would be too expensive to pay for itself.

moreover, 2nd law of thermodynamics tells us that you cannot transfer heat from colder system (inside) to hotter system (outside) without using an external source of energy.