Definition of Latent Heats:
- Latent Heats is the amount of heat absorbed or released by a substance during a phase change without altering its temperature.
Phase Changes Involved in Latent Heats:
- Fusion (Melting): Solid to liquid.
- Vaporization (Boiling/Evaporation): Liquid to gas.
- Sublimation: Solid to gas directly.
- Condensation: Gas to liquid.
- Solidification (Freezing): Liquid to solid.
- Deposition: Gas to solid.
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Types of Latent Heat:
- Latent Heat of Fusion: Heat required to change a substance from solid to liquid or vice versa.
- Latent Heat of Vaporization: Heat required to change a substance from liquid to gas or vice versa.
- Latent Heat of Sublimation: Heat required to change a substance from solid directly to gas.
Importance:
- Climate and Weather: Latent heat plays a crucial role in atmospheric processes, such as the formation of clouds and precipitation.
- Engineering: Used in designing heating and cooling systems, such as heat pumps and refrigeration.
- Everyday Life: Explains phenomena like sweating for cooling and the melting of ice.
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Example:
- When ice melts to water, it absorbs heat from the surroundings without a temperature change until all the ice has melted. This absorbed heat is the latent heat of fusion.
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