A thermochemical equation is a balanced chemical equation written together with its corresponding enthalpy change (ΔH). It shows not only what reacts but also how much heat is released or absorbed for the molar amounts given. Because ΔH depends on the amounts and physical states, these must be specified in the equation.

热化学方程式是连同其相应焓变(ΔH)一同写出的配平化学方程式。它不仅表明发生了什么反应,还表明对于所给的摩尔量放出或吸收多少热量。由于 ΔH 取决于物质的量和物理状态,这些都必须在方程式中注明。