If energy can’t be created or destroyed, what happens to heat when it eventually cools down?

Question

Energy cannot be created or destroyed, then where does it go when cooling or heating over time?

In: Physics

Answer 1

Well, what *does* happen when something cools down? Do you feel any particular sensation when you hold a hot object? Or when you stand in a hot room?

Heat spreads out. It doesn’t vanish, it just ends up everywhere. When you hold a hot object, that heat ends up in you. When you stand in a cold room, your heat ends up in the air around you.