Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The quantity of heat absorbed or released by a substance undergoing a change of state, such as ice changing to water or water to steam, at constant temperature and pressure. Also called heat of transformation.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. the heat that is released or absorbed accompanying a change of state or of phase

from the GNU version of the Collaborative International Dictionary of English

  • adj. that quantity of heat which disappears or becomes concealed in a body while producing some change in it other than rise of temperature, as fusion, evaporation, or expansion, the quantity being constant for each particular body and for each species of change; the amount of heat required to produce a change of phase.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. heat absorbed or radiated during a change of phase at a constant temperature and pressure

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