Although water evaporate and becomes vapor, the vapor becomes water when it is cooled. An identical amount of calories (about 600 cal/g) is released in this process as was needed in the evaporation process. Energy must be removed from the condensing particles to make a vapor condense. Latent heat of condensation is energy released when water vapor condenses to form liquid droplets. The latent heat of condensation is defined as the heat released when one mole of the substance condenses. The amount of heat energy absorbed or released for a phase change is known as latent heat. Latent heat, characteristic amount of energy absorbed or released by a substance during a change in its physical state that occurs without changing its temperature. Heat which is released during vapor becomes water is called heat of condensation. It is expressed as kg/mol or kJ/kg. Formula of Latent Heat When heat is added to a substance, melting, vaporization or sublimation may occur. 11. 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. It is the heat released or absorbed during phase change. It is the same amount of energy as latent heat and two to five times larger compered with sensible heat. Condensation is the reverse process, where heat in transferred away from a substance to its surroundings. This release of latent heat increases the temperature of the surroundings. Latent Heat. Latent heat is the heat required to convert a solid into a liquid or vapor phase, or a liquid into a vapor phase. When heat is extracted from a substance, freezing, condensation and deposition may occur. The heat of condensation is a heat of state change. This is why condensation occurs on cold surfaces: the heat transfers energy away from the warm vapor to the cold surface. SUMMARY Latent heat capacity – is the amount of heat that will change the state of a substance at a specific temperature. This is one mechanism of how thunderstorms maintain their intensity. Latent heat, energy absorbed or released by a substance during a change in its physical state (phase) that occurs without changing its temperature. Latent heat of condensation is the driving force behind all tropical cyclones. The temperature does not change during this process, so heat released goes directly into changing the state of the substance. Latent heat of condensation is energy released when water vapor condenses to form liquid droplets. According to the different phases, it has different names like the heat of condensation, the heat of vaporization, etc.

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