THERMOCHEMICAL EQUATION

An compact equation representing a chemical reaction that describes both the stoichiometry and the energetics of the reaction. For example, the thermochemical equation CH 4 (g) + 2 O 2 (g) CO 2 (g) + 2 H 2 O(g), H = -2220 kJ means "When one mole of gaseous CH 4 is burned in two moles of oxygen gas, one mole of CO 2 gas and 2 moles of steam are produced, and 2220 kilojoules of heat are released."