Eli5 – would it take more time/energy to boil a pint of frozen water or freeze a pint of boiling water?

Question

Eli5 – would it take more time/energy to boil a pint of frozen water or freeze a pint of boiling water?

In: 2

Answer 1

Assuming the mass of water is the same in both scenarios (density of water changes with different phases), the amount of energy is the same. However, the time it’ll take to get frozen water to boiling is dependent on how quickly you can add energy to it (heating power), while freezing boiling water depends on how quick you can take away the energy (cooling power).