Why does it take longer to freeze things than to heat them up?

Question

yes, but why?

Answer 1

convection is a part.  As water heats up the molecules can transfer energy because they move faster and faster.  When you freeze water, you are stopping the molecules and trying to get that one molecule in the middle to pass its energy trough a bunch of other molecules is tougher.

Answer 2

because heat is faster.For example you get a frozen hot dog and a not frozen hot dog.Put the frozen hot dog in a pot filled with water put on the stove and then put the not  frozen one in the freezer.See what happens or try another foood.

Answer 3

it's easier to get a higher temperature compared to a very low one.

Answer 4

It depends on what your cooling it will, and the rate or lost of heat transfer.

Heating something with a 200 C plus heater it going to heat it up much faster than cooling something from room temperature using a -20 C fridge because of the big temperature difference between them.

However if you stuck something in liquid nitrogen it can cool just as quickly as heating it up, simply again because of the difference in temperature.