Evaluating an enthalpy change that can not be measured directly

…

…reaction vessel. Also heat may well have been lost through the open top of the container, even though there was a lid this was not very secure some heat will have escaped through here. In summation the experiment was very difficult to undertake as the enthalpy change for DeltaH1 is hard to determine due to the fact that it thermally decomposes in the air, causing great problems in calculating its enthalpy change with its surroundings.