Question

How much energy is generated from freezing 2.5 g of water?

Answer 1

Answer:

200

calories.

Explanation:

The (latent) heat of fusion of a material, is either one of:

1) the heat required to melt the material without temperature change or

2) the heat removed from the material to freeze it without temperature change.

For water this latent heat is

80

cal/g

. Multiply this by

2.5g to get 200cal

.