Chemical Calorimetry

Experiment 9: Chemical Calorimetry 10/11/12 sort Report Purpose The purpose of this lab was to count the agitate in hydrogen from the chemical calorimetry of magnesium and hydrochloric blistery utilizing Hesss legal philosophy to decree said throw. See summary in equation build below. A. Mg(s)+2HCl(aq)?MgCl2(aq)+H2(g); ?H= careful in testing ground 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: water supply Temperatures Calorimeter struggle #| Cold Water Temp °C| perfervid 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 fly off the handle Capacity: 43°C/J Table 2: Mg chemical reaction Data Mg reception| | test 1| Trial 2| Trial 3| Mg smoke (g)| 0.1506| 0.1503| 0.1506| modify Calorimeter luck (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| chemical reaction (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| 24.6 1| Initial HCl Temperature (ºC)| 22.7| 22! .4| 22.5| 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 burst out 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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