Question

Q20:

20. What is meant by saying that
(a) the latent heat of fusion is ice in 3.34 x 10⁵ J/kg ?
(b) the latent heat of yaporization of water is 22.5 x 10⁵ J/kg?

Answer 1

Dear Student

For ice, the latent heat of fusion means that 334 kJ of heat is required to convert 1 kg of ice at 0ºC into 1 kg of water at 0ºC. Conversely, 334 kJ of heat is released when 1 kg of water freezes at 0ºC to give 1 kg of ice at 0ºC.

Latent heat of vaporization of water means that 2,260 kJ of heat must be provided to convert 1 kg of water at 100ºC into 1 kg of vapour at 100ºC. Conversely, 2260 kJ of heat is released when 1 kg of vapour condenses at 100ºC to give 1 kg of water at 100ºC.

Regards