Determining The Enthalpy Change Of The Decompositi

Determining the Enthalpy Change of the decomposition of sodium atomic number 1 carbonate (conclusion + evaluation) Conclusion I shew that ?H1 = 23.4 kJ/ seawall and ?H2 = 20.6 kJ/mol 2NaHCO3(s) ? Na2CO3(s) + H2O(l) + carbonic acid gas(g) response 1: 2NaCl(aq) + CO2(g) + H2O(l) ? 2HCL(aq) + Na2CO3 (-?H) Reaction 2: 2HCl(aq) + 2NaHCO3(s) ? 2NaCl(aq) + 2H2O(l) + 2CO2(g) (2 x ?H) The HCl, NaCl, H2O and CO2 cornerstonecel out to leave: 2NaHCO3(s) ? Na2CO3(s) + H2O(l) + CO2(g) thusly: ?Hr = 2 x ?H2 + (-?H1) = 2 x 23.4 + 20.6 = 67.4 ± 2.3 (3.46%) kJ/mol = ?Hr ?Hr is exacting which means that that the reaction is destruction early(a)mic i.e. get-up-and-go was interpreted in from the surroundings. In other voice communication more than energy was exhausted breaking bonds, which require energy to be taken in, than qualification them, which releases energy. The literature value was found to be 90.0 kJ/mol Therefore the data-based misplay is: 90.0-67.490.0=25.1 % Since 25.1% > 3.46% (the frame-up misplay) there must have been other errors with the experiment itself to understanding this. Evaluation The circumstantial heat capacity and the density of HCl were taken as the respective set for water. This would create a leave for Q which is not completely reliable (as the values for c and m would not be correct). We could improve this by working(a) out the specific heat capacities 1.00 mol dm-3 HCl. The parallax error is a fault in this experiment, the thermometer suffered from this effect. Results can be higher than anticipate when one looks tries to hit eye level one can go on a lower floor eye level and read the values incorrectly. The variations in view angles would cause series of random errors. This error could be alter by the use of a digital thermometer which would negate the parallax error all together; with a digital thermometer readings would also be more precise as wellhead as more accurate. The stirring happen ed inconsistently and thus added a series of! boosts of energizing energy for the molecules rather than a unvarying stream of kinetic energy. This...If you want to get a just essay, order it on our website: OrderCustomPaper.com

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