Why temperature stays the same while a substance melts or boils
In short: When ice melts or water boils, the temperature remains constant despite the constant input of heat. This video explains the physics of specific latent heat and how energy is used to rearrange molecules rather than increase thermal motion.
To shift 1 kg of a material between different physical phases while maintaining a constant temperature, a specific amount of latent heat is needed. Instead of increasing the kinetic energy of the molecules (which would raise the temperature), the heat energy is consumed to overcome the forces holding the molecules together.
This distinction is crucial for understanding phase changes. The energy acts as a mechanism to separate molecules, making it a fundamental concept in thermodynamics and chemistry.
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Sources
- Summary by Intellect · source: Specific Latent Heat | Matter | Physics | FuseSchool
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