Chemical Calorimetry

Experiment 9: Chemical Calorimetry 10/11/12 sort Report Purpose The purpose of this lab was to work the agitate in hydrogen from the chemical calorimetry of magnesium and hydrochloric caustic utilizing Hesss equity to decree said multifariousness. See compact in equation build below. A. Mg(s)+2HCl(aq)?MgCl2(aq)+H2(g); ?H= careful in science laboratory B. MGO(s) +2HCl2(aq)?MGCl2(aq)+H2O (g);?H=measured in Lab Use above two equations & thermochemical principles to picture change in enthalpy : C. 2H2(s) +O2 (g) ?H2O (l); ?H=-571.6KJ Hesss Law of heat summation to predict the enthalpy change of the answer: D. 2Mg(s) +O2 (g) ?2MgO(s) Procedure Followed lab procedure as outlined in Chemistry 1127 lab manual, experiment #9. Results Table 1: piddle Temperatures Calorimeter struggle #| Cold Water Temp °C| fervent Water Temp °C| plateau Temp °C| C: Calorimeter (J)| 1| 23.5| 42.4| 30.8| 61.0| 2| 24.8| 55.1| 36.8| 54.9| 3| 24.9| 60.6| 38.7| 61.4| Average blow ones stack Capacity: 43°C/J Table 2: Mg chemical reaction Data Mg chemical reaction| | test 1| Trial 2| Trial 3| Mg trade (g)| 0.1506| 0.1503| 0.1506| modify Calorimeter commode (g)| 30.84| 30.80| 30.82| 0.10 M HCl mass (g)| 25.45| 24.79| 25.15| Initial HCl Temperature (ºC)| 22.5| 22.7| 22.

5| Plateau HCl Temperature (ºC)| 55.6| 45.4| 46.4| response (kJ)| -4.93| -3.42| -3.49| ?H Mg (kJ/mol)| -740| -550| -560| Average ?H: -620 kJ/mol MgO Reaction| | Trial 1| Trial 2| Trial 3| Mg mass (g)| 0.2504| 0.2507| 0.2516| Dry Calorimeter mass (g)| 30.95| 31.12| 31.06| HCl mass (g)| 25.09| 24.63| 24.61| Initial HCl Temperature (ºC)| 22.7| 22.4| 2! 2.5| Plateau HCl Temperature (ºC)| 28.9| 29.8| 32.7| Reaction (kJ)| -1.04| -1.08| -1.04| ?H Mg (kJ/mol)| -178| -169| -238| Average ?H: -200 kJ/mol Calculations Calorimeter brand Capacity: qcal + qcw + qhw = 0 [C x ?T]cal + [c x m x ?T]cw + [c x m x ?T]hw Trial...If you want to get a full essay, order it on our website: OrderEssay.net

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