Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Standard_enthalpy_of_formation> ?p ?o }
- Standard_enthalpy_of_formation abstract "The standard enthalpy of formation or standard heat of formation of a compound is the change of enthalpy during the formation of 1 mole of the compound from its constituent elements, with all substances in their standard states at 1 atmosphere (1 atm or 101.3 kPa). Its symbol is ΔHfO or ΔfHO. The superscript theta (zero) on this symbol indicates that the process has occurred under standard conditions at the specified temperature (usually 25 degrees Celsius or 298.15 K). Standard states are as follows:For a gas: the standard state is a pressure of exactly 1 atmFor a solute present in an ideal solution: a concentration of exactly one mole/liter (M) at a pressure of 1 atmFor a pure substance or a solvent in a condensed state (a liquid or a solid): the standard state is the pure liquid or solid under a pressure of 1 atmFor an element: the form in which the element is most stable under 1 atm of pressure. One exception is phosphorus, for which the most stable form at 1 atm is black phosphorus, but white phosphorus is chosen as the standard reference state for zero enthalpy of formation.For example, the standard enthalpy of formation of carbon dioxide would be the enthalpy of the following reaction under the conditions above:C(s,graphite) + O2(g) → CO2(g)All elements are written in their standard states, and one mole of product is formed. This is true for all enthalpies of formation.The standard enthalpy of formation is measured in units of energy per amount of substance, usually stated in kilojoule per mole (kJ mol−1), but also in calorie per mole, joule per mole or kilocalorie per gram (any combination of these units conforming to the energy per mass or amount guideline).In physics the energy per particle is often expressed in electronvolts which corresponds to about 100 kJ mol−1.All elements in their standard states (oxygen gas, solid carbon in the form of graphite, etc.) have a standard enthalpy of formation of zero, as there is no change involved in their formation.The formation reaction is a constant pressure and constant temperature process. Since the pressure of the standard formation reaction is fixed at 1 atm, the standard formation enthalpy or reaction heat is a function of temperature. For tabulation purposes, standard formation enthalpies are all given at a single temperature: 298 K, represented by the symbol ΔHf298O.".
- Standard_enthalpy_of_formation thumbnail Born-haber_cycle_LiF.svg?width=300.
- Standard_enthalpy_of_formation wikiPageExternalLink chemistry.
- Standard_enthalpy_of_formation wikiPageID "49887".
- Standard_enthalpy_of_formation wikiPageLength "14479".
- Standard_enthalpy_of_formation wikiPageOutDegree "98".
- Standard_enthalpy_of_formation wikiPageRevisionID "703288918".
- Standard_enthalpy_of_formation wikiPageWikiLink Acetone.
- Standard_enthalpy_of_formation wikiPageWikiLink Acetylene.
- Standard_enthalpy_of_formation wikiPageWikiLink Allotropes_of_phosphorus.
- Standard_enthalpy_of_formation wikiPageWikiLink Allotropy.
- Standard_enthalpy_of_formation wikiPageWikiLink Ammonia.
- Standard_enthalpy_of_formation wikiPageWikiLink Ammonium_nitrate.
- Standard_enthalpy_of_formation wikiPageWikiLink Atmosphere_(unit).
- Standard_enthalpy_of_formation wikiPageWikiLink Benzene.
- Standard_enthalpy_of_formation wikiPageWikiLink Born–Haber_cycle.
- Standard_enthalpy_of_formation wikiPageWikiLink Bromine.
- Standard_enthalpy_of_formation wikiPageWikiLink Calcium.
- Standard_enthalpy_of_formation wikiPageWikiLink Calcium_carbonate.
- Standard_enthalpy_of_formation wikiPageWikiLink Calcium_oxide.
- Standard_enthalpy_of_formation wikiPageWikiLink Calorie.
- Standard_enthalpy_of_formation wikiPageWikiLink Calorimetry.
- Standard_enthalpy_of_formation wikiPageWikiLink Carbon.
- Standard_enthalpy_of_formation wikiPageWikiLink Carbon_dioxide.
- Standard_enthalpy_of_formation wikiPageWikiLink Carbon_monoxide.
- Standard_enthalpy_of_formation wikiPageWikiLink Category:Enthalpy.
- Standard_enthalpy_of_formation wikiPageWikiLink Category:Thermochemistry.
- Standard_enthalpy_of_formation wikiPageWikiLink Chemical_formula.
- Standard_enthalpy_of_formation wikiPageWikiLink Chlorine.
- Standard_enthalpy_of_formation wikiPageWikiLink Copper(II)_sulfate.
- Standard_enthalpy_of_formation wikiPageWikiLink Electronvolt.
- Standard_enthalpy_of_formation wikiPageWikiLink Enthalpy.
- Standard_enthalpy_of_formation wikiPageWikiLink Enthalpy_change_of_solution.
- Standard_enthalpy_of_formation wikiPageWikiLink Enthalpy_of_atomization.
- Standard_enthalpy_of_formation wikiPageWikiLink Enthalpy_of_mixing.
- Standard_enthalpy_of_formation wikiPageWikiLink Enthalpy_of_neutralization.
- Standard_enthalpy_of_formation wikiPageWikiLink Enthalpy_of_sublimation.
- Standard_enthalpy_of_formation wikiPageWikiLink Ethane.
- Standard_enthalpy_of_formation wikiPageWikiLink Ethanol.
- Standard_enthalpy_of_formation wikiPageWikiLink Ethylene.
- Standard_enthalpy_of_formation wikiPageWikiLink Exothermic_process.
- Standard_enthalpy_of_formation wikiPageWikiLink Fluorine.
- Standard_enthalpy_of_formation wikiPageWikiLink Glucose.
- Standard_enthalpy_of_formation wikiPageWikiLink Graphite.
- Standard_enthalpy_of_formation wikiPageWikiLink Heat_of_combustion.
- Standard_enthalpy_of_formation wikiPageWikiLink Heat_of_formation_group_additivity.
- Standard_enthalpy_of_formation wikiPageWikiLink Hesss_law.
- Standard_enthalpy_of_formation wikiPageWikiLink Hydrogen.
- Standard_enthalpy_of_formation wikiPageWikiLink Hydrogen_chloride.
- Standard_enthalpy_of_formation wikiPageWikiLink Hydrogen_fluoride.
- Standard_enthalpy_of_formation wikiPageWikiLink Ideal_solution.
- Standard_enthalpy_of_formation wikiPageWikiLink Iodine.
- Standard_enthalpy_of_formation wikiPageWikiLink Ionization_energy.
- Standard_enthalpy_of_formation wikiPageWikiLink Isopropyl_alcohol.
- Standard_enthalpy_of_formation wikiPageWikiLink Joule.
- Standard_enthalpy_of_formation wikiPageWikiLink Kilogram.
- Standard_enthalpy_of_formation wikiPageWikiLink Methane.
- Standard_enthalpy_of_formation wikiPageWikiLink Methanol.
- Standard_enthalpy_of_formation wikiPageWikiLink Molar_concentration.
- Standard_enthalpy_of_formation wikiPageWikiLink Mole_(unit).
- Standard_enthalpy_of_formation wikiPageWikiLink Nitric_oxide.
- Standard_enthalpy_of_formation wikiPageWikiLink Nitrogen.
- Standard_enthalpy_of_formation wikiPageWikiLink Nitrogen_dioxide.
- Standard_enthalpy_of_formation wikiPageWikiLink Oxygen.
- Standard_enthalpy_of_formation wikiPageWikiLink Ozone.
- Standard_enthalpy_of_formation wikiPageWikiLink Phase_(matter).
- Standard_enthalpy_of_formation wikiPageWikiLink Phosphorus.
- Standard_enthalpy_of_formation wikiPageWikiLink Physics.
- Standard_enthalpy_of_formation wikiPageWikiLink Propane.
- Standard_enthalpy_of_formation wikiPageWikiLink Saturation_(chemistry).
- Standard_enthalpy_of_formation wikiPageWikiLink Silicon_dioxide.
- Standard_enthalpy_of_formation wikiPageWikiLink Silver.
- Standard_enthalpy_of_formation wikiPageWikiLink Silver_chloride.
- Standard_enthalpy_of_formation wikiPageWikiLink Sodium.
- Standard_enthalpy_of_formation wikiPageWikiLink Sodium_bicarbonate.
- Standard_enthalpy_of_formation wikiPageWikiLink Sodium_carbonate.
- Standard_enthalpy_of_formation wikiPageWikiLink Sodium_chloride.
- Standard_enthalpy_of_formation wikiPageWikiLink Sodium_hydroxide.
- Standard_enthalpy_of_formation wikiPageWikiLink Sodium_nitrate.
- Standard_enthalpy_of_formation wikiPageWikiLink Solution.
- Standard_enthalpy_of_formation wikiPageWikiLink Solvent.
- Standard_enthalpy_of_formation wikiPageWikiLink Standard_enthalpy_change_of_formation_(data_table).
- Standard_enthalpy_of_formation wikiPageWikiLink Standard_enthalpy_of_reaction.
- Standard_enthalpy_of_formation wikiPageWikiLink Standard_state.
- Standard_enthalpy_of_formation wikiPageWikiLink State_function.
- Standard_enthalpy_of_formation wikiPageWikiLink Sucrose.
- Standard_enthalpy_of_formation wikiPageWikiLink Sulfur_dioxide.
- Standard_enthalpy_of_formation wikiPageWikiLink Sulfur_trioxide.
- Standard_enthalpy_of_formation wikiPageWikiLink Sulfuric_acid.
- Standard_enthalpy_of_formation wikiPageWikiLink Thermochemistry.
- Standard_enthalpy_of_formation wikiPageWikiLink Water_(data_page).
- Standard_enthalpy_of_formation wikiPageWikiLink Water_vapor.
- Standard_enthalpy_of_formation wikiPageWikiLink Zinc_sulfate.
- Standard_enthalpy_of_formation wikiPageWikiLink File:Born-haber_cycle_LiF.svg.
- Standard_enthalpy_of_formation wikiPageWikiLinkText "Standard enthalpy of formation".
- Standard_enthalpy_of_formation wikiPageWikiLinkText "enthalpies of formation".
- Standard_enthalpy_of_formation wikiPageWikiLinkText "enthalpy of formation".
- Standard_enthalpy_of_formation wikiPageWikiLinkText "enthalpy".
- Standard_enthalpy_of_formation wikiPageWikiLinkText "heat of formation".
- Standard_enthalpy_of_formation wikiPageWikiLinkText "standard enthalpies of formation".