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 term was introduced around 1762 by British chemist Joseph Black. When the heat of fusion is referenced to a unit of mass, it is usually called the specific heat of fusion, while the molar heat of fusion refers to the enthalpy change per amount of substance in moles. To learn more about the latent heat of fusion and other important topics in chemistry, register with BYJU’S and download the mobile application on your smartphone. This can be explained by the fact that the particles or molecules that constitute liquids have very high potential energies due to the fact that they are held together by relatively weak intermolecular forces. In meteorology, latent heat flux is the flux of energy from the Earth's surface to the atmosphere that is associated with evaporation or transpiration of water at the surface and subsequent condensation of water vapor in the troposphere.
Below temperatures of 0.3K (at temperatures approaching absolute zero), the helium-3 isotope has a negative value for the latent heat of fusion. a form of potential energy, and the sensible heat as an energy that was indicated by the thermometer,[8] relating the latter to thermal energy. The specific latent heat of condensation of water in the temperature range from −25 °C to 40 °C is approximated by the following empirical cubic function: where the temperature Latent heat (also known as latent energy or heat of transformation) is energy released or absorbed, by a body or a thermodynamic system, during a constant-temperature process — usually a first-order phase transition. In contrast to latent heat, sensible heat is energy transferred as heat, with a resultant temperature change in a body. Therefore, the energy required to dissociate the intermolecular forces of attraction between the liquid particles is also relatively lower when compared to solids. Latent Heat of Fusion: Latent heat of fusion is the heat absorbed or released when matter melts, changing phase from solid to liquid form at a constant temperature. An example of the latent heat of solidification can be observed in the cooling of water. When water, initially kept in the liquid state, is cooled to temperatures below zero degrees celsius, the temperature of the liquid water steadily drops until it approaches 0oC. Latent heat is associated with the change of phase of atmospheric or ocean water, vaporization, condensation, freezing or melting, whereas sensible heat is energy transferred that is evident in change of the temperature of the atmosphere or ocean, or ice, without those phase changes, though it is associated with changes of pressure and volume. You may need to download version 2.0 now from the Chrome Web Store. Once the water is completely frozen, the temperature of the solid continues to drop below zero degrees celsius as it is cooled further.
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