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Evaluating An Enthalpy Change That Cannot Be Measured Directly.
Word count: 627 | Approximate pages: 3
Dr. Watson.
Introduction.
We were told that sodium hydrogencarbonate decomposes on heating to give sodium
carbonate, water and carbon dioxide as shown in the equation below:-
2NaHCO3(s)--------> Na2CO3 (s) + H2O (l) + CO2 (g) = DeltaH1
This was given as deltaH1 and we had to calculate as part of the experiment.
This however cannot be measured directly, but can be found using the enthalpy
changes from two other reactions. These being that of sodium hydrogencarbonate
and hydrochloric acid and also sodium carbonate and hydrochloric acid.
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