| heat of sublimation |
(Or latent heat of sublimation.) See latent heat.
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| heat of vaporization |
(Or latent heat of vaporization.) See latent heat.
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| heat capacity |
(Also called thermal capacity.) The ratio of the energy or enthalpy absorbed (or released) by a system to the corresponding temperature rise (or fall). Heat capacities are defined for particular processes. For a constant volume process, where U is the internal energy of a system and T is its temperature. For a constant pressure process, where H is the system enthalpy. The heating rate, Q, for a constant volume process is whereas in a constant pressure process, See specific heat capacity.
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| heat |
1. (Or heat content.) A form of energy transferred between systems, existing only in the process of transfer. 2. Same as enthalpy. Heat, used as a noun, is confusing and controversial in its scientific meaning. The differential of heat is considered imperfect in that its value depends on the process applied. In the thermodynamic definitions in this glossary, heat is avoided as a noun or adjective except where required by established use. ...
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| heart |
An organ positioned centrally in the chest, with the right margin directly underneath the right side of the sternum, or breastbone. The rest of the heart points to the left, with the lowest point located directly underneath the left nipple.
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