# heat of vaporization

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## heat of vaporization

n.
The amount of heat required to convert a unit mass of a liquid at its boiling point into vapor without an increase in temperature.
ThesaurusAntonymsRelated WordsSynonymsLegend:
 Noun 1 heat of vaporization - heat absorbed by a unit mass of a material at its boiling point in order to convert the material into a gas at the same temperatureheat of vaporisationheat of transformation, latent heat - heat absorbed or radiated during a change of phase at a constant temperature and pressure
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References in periodicals archive ?
IH molar heat of vaporization cal.mol-1###12,715.1052###10,786.3289###15,583.174###19,079.8279
To calculate the latent heat of vaporization of the water of the product (L) for each condition of hygroscopic equilibrium moisture content of the seeds and for each temperature studied, Eq.
where [DELTA][T.sub.sat] is the wall superheat (=[T.sub.s] - [T.sub.sat]), [sigma] is the surface tension of bulk liquid at saturation, [T.sub.l] is the bulk liquid temperature, [v.sub.lv] is the specific volume difference between vapor and liquid (=[v.sub.v] - [v.sub.l]), [L.sub.lv] is the latent heat of vaporization, and [R.sub.c] is the radius of liquid/vapor interface curvature in a cavity.
where [e.sub.s] is the saturation vapor pressure (Pa), [e.sub.0] is the vapor pressure at the triple point of water (611.12 Pa), [l.sub.[upsilon]] is the latent heat of vaporization (equal to 2.5008 x [10.sup.6] J [kg.sup.-1] at 0[degrees]C, decreasing by about 10% as temperature increases to 100[degrees]C), [R.sub.[upsilon]] is the individual gas constant for vapor (461.2 J [kg.sup.-1] [K.sup.-1]), [T.sub.0] is the temperature at the triple point (273.16 K), and T is the temperature (K) (Miller 2015).
where [r.sub.d]--latent heat of vaporization at condensation temperature.
A comparison of the heat of vaporization values obtained (for characteristic values see column 5, Table) with those of pure compounds at the same temperatures (from [22]) suggests that somewhat lower molecular weight values should have been used in the calculations.
Bi-phase or phase-transition heat spreaders and heat pipes, commonly found in laptop computers and other highly dense electronic assemblies, take advantage of the large heat of vaporization exhibited by readily available liquids.
Refrigerant selection is based on the cooling requirements and the latent heat of vaporization of refrigerant itself.
A soldier stops, kneels and pfff, gone, vanished, all ears ringing in the silent rain of dust, blood dry as rock and sand, as a pebble placed in one's dry, cottony mouth to cure a desiccated tongue to allow speech, but there is none, all vanished in the heat of vaporization as he saw his Christian friend disappear, an IED that could slash and gut a Humvee, turned just at that moment to see him kneel and pfff nothing left because all is vanity, and what stays is the nothing that is there and is not there; his face recedes, his name, not even a replacement because time is short and the mission, the prayer, pfff, an image not an image staying and staying because where else the scripture that explains pfff ...

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