In a thermochemical equation, the ___ change is always written next to the balanced chemical equation

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05-06-2018
Chemistry

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In a thermochemical equation, the ___ change is always written next to the balanced chemical equation

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Dejanras Dejanras · Answer 1 · 2018-06-14T13:27:19+02:00

In a thermochemical equation, the enthalpy change is always written next to the balanced chemical equation.

For example, chemical reaction: 2Mg + O₂ → 2MgO. ΔH = -1204 kJ; this is exothermic reaction,
or chemical reaction: Fe₂O₃(s) + 3CO(g) → 2Fe(s) + 3CO₂(g);ΔH = + 26.3 kJ, ths is endothermic reaction.
There are two types of reaction: endothermic reaction (chemical reaction that absorbs more energy than it releases) and exothermic reaction (chemical reaction that releases more energy than it absorbs).