Is vaporization is a exothermic or endothermic?

Answer 1

Yes, vaporization is an endothermic reaction while freezing is an exothermic reaction. Think of a pot of water set of the stove. What are you doing to it? You're putting in heat in order to break the hydrogen bonds. The heat/energy is being expendedor absorbed to make the water boil. In the case of freezing (say water), the hydrogen bonds are realigning while producing heat.

Answer 2

Evaporation is endothermic, as energy must be put into the system to cause evaporation.

Answer 3

Yes, it is endothermic because the molecules of the evaporating substance must gain energy to enter the gas phase.

Answer 4

I believe that the vaporization (and also the evaporation) is an endothermic process - with heat absorbtion.

Answer 5

it's endothermic - energy is supplied

Answer 6

Vaporization is Endothermic

Answer 7

exothermic