The
kilocalorie per mole is a unit to measure an amount of
energy per number of
molecules,
atoms, or other similar
particles. It is defined as one
kilocalorie of energy (1000 thermochemical gram
calories) per one
mole of substance, that is, per
Avogadro’s number of particles. It is abbreviated "kcal/mol" or "kcal mol
-1". As typically measured, one kcal/mol represents a temperature increase of one degree Celsius in one liter of water (with a mass of 1kg) resulting from the reaction of one mole of reagents.