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Home > Heat of vaporization


The heat of vaporization is a physical property of substances. It is defined as the heat required to vaporize one mole of a substance at its boiling point under standard pressure (101325 Pa). The heat of vaporization is expressed in kJ/mol. The use of kJ/kg is also possible, but less customary.

Because vaporization is the opposite process of condensation, the term heat of condensation is also used. The latter is defined as the heat released when one mole of the substance condenses at its boiling point under standard pressure.

The heat of vaporization of water is about 2260 kJ/kg which is equal to 40.8 kJ/mol. This is quite a lot: five times the energy needed for heating the water from 0 to 100 degrees Celsius.

Heats of vaporization of the elements

ElementHeat of vaporization ( kJ/mol)
Actiniumn/a
Aluminium293.4
Antimony77.14
Argon6.447
Arsenic34.76
Astatine114
BariumBarium is also the latin name for the city Bari in Italy. Barium is a toxic chemical element in the periodic table that has the symbol Ba and atomic number 56. A soft silvery metallic element, barium is an alkaline earth metal and melts at a very high tem142
BerylliumBeryllium is the chemical element in the periodic table that has the symbol Be and atomic number 4. A toxic bivalent element, beryllium is a steel grey, strong, light-weight yet brittle, alkaline earth metal, that is primarily used as a hardening agent in292.40
BismuthBismuth is a chemical element in the periodic table that has the symbol Bi and atomic number 83. This heavy, brittle, white crystalline trivalent poor metal has a pink tinge and chemically resembles arsenic and antimony. Most diamagnetic of all metals, bi104.8
BoronBoron is the chemical element in the periodic table that has the symbol B and atomic number 5. A trivalent metalloid element, boron occurs abundantly in the ore borax. There are two allotropes of boron; amorphous boron is a brown powder, but metallic boro489.7
BromineBromine (from Gr. Bromos meaning "stench"), is a chemical element in the periodic table that has the symbol Br and atomic number 35. A halogen element, bromine is a red volatile liquid at room temperature which has a reactivity between chlorine and iodine15.438
CadmiumCadmium is a chemical element in the periodic table that has the symbol Cd and atomic number 48. A relatively rare, soft, bluish-white, toxic transition metal, cadmium occurs with zinc ores and is used largely in batteries. Notable characteristics Cadmium100
CaesiumCaesium (also spelled cesium and pronounced /'sizm/, though it goes against Latin phonetics) is a chemical element in the periodic table that has the symbol Cs and atomic number 55. It is a soft silvery-gold Alkali metal which is one of at least three met67.74
CalciumSee also Calcium, New York, United States. potassium calcium scandium Mg Ca Sr Full table General Name, Symbol, Numbercalcium, Ca, 20 Series alkaline earth metal Group, Period, Block 2 (IIA), 4, s Density, Hardness 1550 kg/m3, 1. 75 Appearance silvery whi153.6
Carbon355.8
Cerium414
Chlorine10.2
Chromium344.3
Cobalt376.5
Copper300.3
Fluorine3.2698
Gallium258.7
Germanium330.9
Gold334.4
Hafnium575
Helium0.0845
ElementHeat of vaporization ( kJ/mol)
Hydrogen0.44936
Indium231.5
Iodine20.752
Iridium604
Iron349.6
Krypton9.029
Lanthanum414
Lead177.7
Lithium145.92
Magnesium127.4
Manganese226
Mercury59.229
Molybdenum598
Neon1.7326
Neptuniumn/a
Nickel370.4
Niobium696.6
Nitrogen2.7928
Osmium627.6
Oxygen3.4099
Palladium357
Phosphorus12.129
Platinum510
Polonium60.1
Potassium79.87
Radium37
ElementHeat of vaporization ( kJ/mol)
Radon16.4
Rhenium715
Rhodium493
Rubidium72.216
Ruthenium595
Scandium314.2
Selenium26.3
Silicon384.22
Silver250.58
Sodium96.96
Strontium144
Sulfur1.7175
Tantalum743
Technetium660
Tellurium52.55
Thallium164.1
Thorium514.4
Tin295.8
Titanium421
Tungsten824
Vanadium452
Xenon12.636
Yttrium363
Zinc115.3
Zirconium58.2
 







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