Question

what is the latent heat of evaporation of water (in calorie per gram) ?

Answer 1

If the liquid water at oC is changed into steam, the heat added(the latent heat of evaporation) is 540 calories for every gram of water.

Answer 2

Similarly, while ice melts, it remains at 0 °C (32 °F), and the liquid water that is formed with the latent heat of fusion is also at 0 °C. The heat of fusion for water at 0 °C is approximately 334 joules (79.7 calories) per gram, and the heat of vaporization at 100 °C is about 2,230 joules (533 calories) per gram.