jähmettymislämpö

Jähmettymislämpö, also known as solidification heat or latent heat of fusion, refers to the amount of thermal energy that must be removed from a substance to change it from a liquid state to a solid state at its melting point. Conversely, it is also the amount of thermal energy that must be absorbed by a substance to change it from a solid to a liquid at its melting point. This energy exchange occurs without a change in temperature; the temperature remains constant during the phase transition.

The value of jähmettymislämpö is specific to each substance. For water, for example, the latent heat of fusion is approximately 334 kilojoules per kilogram. This means that for every kilogram of water that freezes into ice at 0 degrees Celsius, 334 kilojoules of heat must be released into the surroundings. Similarly, when ice melts into water at 0 degrees Celsius, it absorbs 334 kilojoules of heat per kilogram.

Understanding jähmettymislämpö is crucial in various scientific and engineering fields, including meteorology, materials science, and thermodynamics. It plays a significant role in natural phenomena such as the formation of ice and snow and in technological applications like refrigeration and the design of thermal energy storage systems. The energy involved in phase changes is substantial and has practical implications for predicting and controlling temperature changes in different systems.