Question

latent heat of ice is

Answer 1

Latent heat, energy absorbed or released by a substance during a change in its physical state (phase) that occurs without changing its temperature. The latent heat associated with melting a solid or freezing a liquid is called the heat of fusion; that associated with vaporizing a liquid or a solid or condensing a vapour is called the heat of vaporization. The latent heat is normally expressed as the amount of heat (in units of joules or calories) per mole or unit mass of the substance undergoing a change of state.For example, when a pot of water is kept boiling, the temperature remains at 100 °C (212 °F) until the last drop evaporates, because all the heat being added to the liquid is absorbed as latent heat of vaporization and carried away by the escaping vapour molecules. 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. Because the heat of vaporization is so large, steam carries a great deal of thermal energy that is released when it condenses, making water an excellent working fluid for heat engines.

Answer 2

Specific latent heat of fusion(ice) = 0.336 MJ/kg

Step-by-step explanation:

• The amount of heat that can convert a solid into a liquid or vapour, or a liquid into a vapour, without making change in the temperature,is calledf as latent heat.

• When solid changes into liquid the specific latent heat of fusion of ice is the amount of heat required to change 1 kg of ice to water without a change in temperature.

• Specific latent heat of fusion(ice) = 0.336 MJ/kg