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heat of vaporization

   Also found in: Dictionary/thesaurus, Acronyms, Wikipedia 0.01 sec.
heat of vaporization [′hēt əv ‚vā·pə·rə′zā·shən]
(thermodynamics)
The quantity of energy required to evaporate 1 mole, or a unit mass, of a liquid, at constant pressure and temperature. Also known as enthalpy of vaporization; heat of evaporation; latent heat of vaporization.


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w] = molecular weight of water (constant), L = latent heat of vaporization (constant), R = universal gas constant, 273.
Some of these early data for ammonia and steam, most notably the heat capacity and heat of vaporization data, still are considered to be among the very best available.
Latent heat of vaporization of water is 974 Btu/lb = 540 kcal/kg
 
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