Standard enthalpy of formation

Standard enthalpy change of formation in Born–Haber diagram for lithium fluoride.

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 ΔHo
f or Δ_fH. The superscript theta (zero) on this symbol indicates that the process has occurred under standard conditions at the specified temperature (usually 25 °C or 298.15 K). Standard states are as follows:

单词	Standard enthalpy change of formation
释义	Standard enthalpy change of formation 英语百科 Standard enthalpy of formation 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 ΔHo f or Δ_fH. The superscript theta (zero) on this symbol indicates that the process has occurred under standard conditions at the specified temperature (usually 25 °C or 298.15 K). Standard states are as follows:
随便看	soil consistence constent soil consistency soil consistency constant soil consociation soil consolidation soil constant soil constitnent soil constituent soil constitution soil constraint factor soil constraints soil contact soil containing a high percentage of rotted leaves soil contains organic materials Soil contaminant Soil contamination soil content soil coprophagous animal soil core soil core budding soil core method of transplanting soil core planting soil core technique soil correctives soil corrosion

Standard enthalpy change of formation

Standard enthalpy of formation