The change of reaction

Question

In the reaction C2H5OH + 3O2-> 2CO2 + 3H2O, the change of enthalpy was deltaH= -1235.7 kj/mol.

What heat lost or gained in the reaction?

Answer 1

ΔH is a measure of how enthalpy (or heat) changes over the course of a reaction. A negative ΔH represents an exothermic reaction, or a reaction that releases heat into the surrounding environment. Heat was therefore lost from this reaction.