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Evaluating An Enthalpy Change That Cannot Be Measured Directly.
Beginning of essay
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 pa ....
Middle of essay
....e then tabulated, this table is shown below.
Results Table. Results Table for Sodium Hydrogencarbonate.
Results Table for Sodium Carbonate.
Calculations.
From these results I had to calculate deltaH2 and deltaH3. DeltaH2 refers to the
enthalpy change when sodium hydrogencarbonate reacts with hydrochloric acid, and
deltaH3 is the enthalpy change when the sodium carbonate reacts with the acid.
Firstly however it is necessary to show the equations for the two reactions:-
DeltaH2= 2NaHCO3 (s) +.... |
| Number of words: 627 |
Approximate pages: 3 |
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