Determining the enthalpy change of a reaction
Introduction: For this practical I will be determining the enthalpy change of a reaction, using a method that has been given to me. The equation is: CaCO3 CaO(s) + CO2(g) To determine the enthalpy change for this reaction I will use Hess’ Law. ... So, by using Hess’ Law I can use the different temperature changes of these reactions to work out the enthalpy change of calcium carbonate to calcium oxide. ... ΔH3 CaCO3(s) CaO(s) + CO2(g) HCl HCl ΔH1 ΔH2 CaCl2(aq) The enthalpy change is worked out by: ΔH3 = ΔH1 - ΔH2 Safety Issues: Safety is a very important area of this experiment and it should be clearly addressed before any can begin to carry out the experiment. ... 49 Initial acid temperature (˚C) 18 End acid temperature (˚C) 21 Temperature change (˚C) 3 For Calcium Oxide: Mass of CaO (g) 27. ... 33 Initial acid temperature (˚C) 18 End acid temperature (˚C) 30 Temperature change (˚C) 12 Analysis and Conclusion: I can now use the data that I have collected to help find the enthalpy change (ΔH3).