A Thermochemical Equation is a balanced stoichiometric
chemical equation that includes the
enthalpy change, ΔH. In variable form, a thermochemical equation would look like this: A + B → C ΔH = (±) #Where {A, B, C} are the usual agents of a chemical equation with coefficients and “(±) #” is a positive or negative numerical value, usually with units of kJ.
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An compact equation representing a chemical reaction that describes both the
stoichiometry and the energetics of the reaction. For example, the thermochemical equation CH4(g) + 2 O2(g) CO2(g) + 2 H2O(g), H = -2220 kJ means "When one mole of gaseous CH4 is burned in two moles of oxygen gas, one mole of CO2 gas and 2 moles of steam are produced, and 2220 kilojoules of heat are released."
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