Evaluating an enthalpy change that can not be measured directly

Chemistry Experiment. Dr. Watson. Evaluating An Enthalpy Change That Cannot Be Measured Directly. Introduction. We were told that atomic number 11 enthalpy change decomposes on heat to give sodium carbonate, irrigate and carbon dioxide as shown in the par below:-         2NaHCO3(s)--------> Na2CO3 (s) + H2O (l) + CO2 (g) = DeltaH1 This was given as deltaH1 and we had to manoeuvre as part of the experiment. This however cannot be deliberate directly, only if can be found exploitation the total heat changes from two new(prenominal) reactions. These being that of sodium hydrogencarbonate and hydrochloric paneling and also sodium carbonate and hydrochloric acid. We were given a list of instructions in how to take on expose the experiment, which are given later. argument of Apparatus Used. 1 x 500ml Beaker. 1 x Thermometer(-10 to 50oC). 1 x Polystyrene Cup. 1 x Weighing Balance. 1 x Weighing Bottle. 10 grams of Sodium Hydrogencarbonate. 10 gram s of Sodium Carbonate. A bottleful of 2 molar HCL. Diagram. Method. Three grams of sodium hydrogen carbonate was plodding out accurately victimization a weighting bottle and a balance. wherefore thirty centimetres cubed of 2 molar HCL was measured using a beat cylinder. The acid was then placed into the polystyrene loving cup and its temperature was taken and recorded using the thermometer.

The pre- weighted sodium hydrogencarbonate was then added to the solution, and the final temperature was recorded. The contents of the cup were then emptied out and the cup was washed out with water and then thoroughly dried. This was do three times for the sod! ium hydrogen carbonate so that I could pack some(prenominal) anomalies that were obtained. The experiment was then repeated in only the identical manner except sodium carbonate was used alternatively of sodium hydrogen carbonate. The results were then tabulated, this table is shown below. Results Table. Results Table... If you want to prolong a full essay, order it on our website: BestEssayCheap.com

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