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Learn what latent heat is and how it relates to enthalpy, phase changes and temperature. Find out the types of latent heat, such as fusion and vaporization, and their formulas and examples.
- The two forms of latent heat are latent heat of fusion (melting) and latent heat of vapourisation (boiling).
- The specific latent heat is the amount of energy required to change the state of 1 kg of the substance without changing the temperature of the subs...
- The temperature of the boiling water remains at 100 0 C till the last drop evaporates is an example of latent heat.
- A thermometer cannot measure latent heat.
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, like melting or condensation.
Jun 4, 2024 · Latent heat is the energy absorbed or released by a substance during a phase change, such as melting, freezing, or vaporization. Learn how latent heat arises from the work required to overcome the forces that hold atoms or molecules in a material, and see examples of latent heat in different substances and processes.
- The Editors of Encyclopaedia Britannica
Nov 4, 2019 · Latent heat is the thermal energy absorbed or released when a substance undergoes a phase change at constant temperature. Learn about latent heat of fusion, vaporization, and sensible heat, and see a table of values for common materials.
- Anne Marie Helmenstine, Ph.D.
Learn what latent heat is and how it relates to the energy changes during phase transitions of matter. Find out the names, temperatures and values of latent heat for various substances and compounds.
ElementsTm (°c)Tb (°c)Lf (kj/kg)aluminum6602519397argon−189−18629.5bismuth271156454.0bromine (Br2)−759132Because this energy enters or leaves a system during a phase change without causing a temperature change in the system, it is known as latent heat (latent means hidden). The three phases of matter that you frequently encounter are solid, liquid and gas (see Figure 11.8 ).
Jul 11, 2021 · Latent heat is measured in units of J/kg. Both \(L_f\) and \(L_v\) depend on the substance, particularly on the strength of its molecular forces as noted earlier. \(L_f\) and \(L_v\) are collectively called latent heat coefficients.
