enthalpy change of reaction
To determine the enthalpy change of a reaction Calcium carbonate, CaCO3 decomposes with heat. CaC03(s) CaO(s) + CO2 (g) The aim of this practical is to determine the enthalpy change for this reaction by an indirect method based on Hess’s law. ... Energy (enthalpy) changes in chemical reactions are the same, regardless whether the reactions occur in one or several steps. The total energy change in a chemical reaction is the sum of the energy changes in its many steps leading to the overall reaction. ... By recording the temperature change, ∆H1 and ∆H2 can be calculated. ... Calcium carbonate was added to the acid, the reaction is complete as effervescence occurs and a gas was given off.