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Q = m L f (for melting/freezing), Q = m L v (for vaporization/condensation), where L f is the latent heat of fusion, and L v is the latent heat of vaporization. The latent heat of fusion is the amount of heat needed to cause a phase change between solid and liquid.
- 14.3 Phase Change and Latent Heat - College Physics 2e - OpenStax
Latent heat is measured in units of J/kg. Both L f and L v...
- 14.3 Phase Change and Latent Heat - College Physics 2e - OpenStax
The heat \(Q\) required to change the phase of a sample of mass \(m\) is given by \[ Q = mL_f (melting/freezing),\] \[Q = mL_v (vaporization/condensation),\] where the latent heat of fusion, \(L_f\), and latent heat of vaporization, \(L_v\), are material constants that are determined experimentally.
The heat Q required to change the phase of a sample of mass m is given by \(\mathrm{Q=mL_f}\) (melting or freezing) and \(\mathrm{Q=mL_v}\) (evaporating or condensing), where \(\mathrm{L_f}\) and \(\mathrm{L_v}\) are the latent heat of fusion and the latent heat of vaporization, respectively.
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.
The specific latent heat (L) of a material…. is a measure of the heat energy (Q) per mass (m) released or absorbed during a phase change. is defined through the formula Q = mL. is often just called the "latent heat" of the material. uses the SI unit joule per kilogram [J/kg].
Latent heat is measured in units of J/kg. Both Lf L f and Lv L v depend on the substance, particularly on the strength of its molecular forces as noted earlier. Lf L f and Lv L v are collectively called latent heat coefficients.
Heat absorbed or released as the result of a phase change is called latent heat. There is no temperature change during a phase change, thus there is no change in the kinetic energy of the particles in the material.
