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To determine the enthalpy change of a reaction Analysis Results These are the results I obtained from reacting CaCo3 with Hcl and CaO with Hcl, these 2 experiments were done after one another. The temperature changes of each reaction will then be used to determine the enthalpy change. Reaction with CaCO3 CaO Mass used (g) 2.48 1.41 Temperature of acid (Hcl) initially (ºc) 24 24 Temperature of solution after mixing (ºc) 26 36 Temperature change during the reaction (ºc) 2 12 Looking at these results it suggests that CaO was a more reactive reaction and a more exothermic reaction than CaCO3 as more energy was released than the reaction with CaCO3. However, we can see that both reactions were exothermic as when the reaction finished both temperatures of the solution after mixing the reactant with the Hcl rise. We can see that these reactions were not endothermic as the temperatures of the solution would have lowered as energy would have been absorbed. Calcium carbonate, CaCO3 decomposes with heat. CaCO3 (s)...

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