Evaluating An Enthalpy Change That Cannot Be Measured Directly. Essay

Evaluating An Enthalpy Change That Cannot Be Measured Directly.Dr. Watson.Introduction.We were told that sodium hydrogencarbonate decomposes on heating to give sodiumcarbonate, water and carbon dioxide as shown in the equation below-2NaHCO3(s)-------- Na2CO3 (s) + H2O (l) + CO2 (g) = DeltaH1This was wedded as deltaH1 and we had to figure as part of the experiment.This however sacknot be measured directly, but can be found employ the enthalpychanges from two other reactions. These be that of sodium hydrogencarbonateand hydrochloric acid and also sodium carbonate and hydrochloric acid.We were given a list of instructions in how to carry expose the experiment, whichare given later.List of Apparatus Used.1 x 500ml Beaker. 1 x Thermometer(-10 to 50oC). 1 x Polystyrene Cup. 1 x slowness Balance. 1 x Weighing Bottle. 10 grams of Sodium Hydrogencarbonate. 10grams of Sodium Carbonate. A bottle of 2 molar HCL.Diagram.Method.Three grams of sodium hydrogen carbonate was weighted break ac curately using aweighting bottle and a balance. so thirty centimetres cubed of 2 molar HCL wasmeasured using a metre cylinder. The acid was then placed into thepolystyrene cup and its temperature was taken and recorded using the thermometer.The pre-weighted sodium hydrogencarbonate was then added to the solution, andthe final temperature was recorded.The contents of the cup were then emptied out and the cup was washed out withwate...