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An Experiment to Determine the Enthalpy Change for the Decomposition of Calcium Carbonate Aim: to determine the enthalpy change for the decomposition of calcium carbonate CaCO3(s) CaO(s) + CO2(g) Problem: this experiment cannot be done because many reactions have enthalpy changes that cannot be found directly from a single experiment due to many factors which includes the fact that you cannot measure the amount heat that has been put in from the Bunsen burner. So in order to determine the enthalpy change for the decomposition of calcium carbonate Hess's Law needs to be used because it provides a method for the indirect determination of the enthalpy changes. Hess's Law is an extension of the First Law of Thermodynamics. Hess's Law states that, if a reaction can take place by more than one route and the initial and final conditions are the same, the total enthalpy change is the same for each route. So I will measure...

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