2.2 0.0 / 5 ? ChemistryEnergeticsASWJEC Created by: cassie97Created on: 03-05-14 23:45 Hess' Law definition. Energy can only go from one form to another. It cannot be created or destroyed. 1 of 5 Hess' "Law" "The energy change for a reaction is always the same and is independent on the route taken. 2 of 5 Delta H - Enthalpy Change The heat in a closed system. 3 of 5 The enthalpy change of formation. Forming a compound from its elements. 4 of 5 The enthalpy change of combustion. Completely burning a substance in O2. 5 of 5
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