Calculate the change in enthalpy (LaTeX: \DeltaΔH) of a reaction with the following information:

Energy of Reactants = 129 kJ

Energy of the Products = 110 kJ

Energy of the Transition State = 198 kJ

-19 kJ

Explanation:

The change in enthalpy is mathematically expressed as the difference between the the total potential energy of products and the potential energy of the reactants :

Where:

Then:

The negative sign in this result means we have a negative enthalpy, hence an exothermic reaction (where heat is released).

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