Yes, heat is energy density which is why pressure is basically the same thing as heat. That's why a pressure cooker can generate incredible pressure just by hea

Yes, heat is energy density which is why pressure is basically the same thing as heat. That's why a pressure cooker can generate incredible pressure just by heating it. Similarly, your refrigerator cools things by expanding a liquid into a gas (state change is actually the dominant mechanism in a refrigerator but it would work in principle with out the state change)