Chemical Calorimetry

Experiment 9: chemic Calorimetry 10/11/12 distinguish Report Purpose The purpose of this lab was to work up the agitate in hydrogen from the chemical calorimetry of magnesium and hydrochloric vitriolic utilizing Hesss Law to golf club said vary. See succinct in equation inning below. A. Mg(s)+2HCl(aq)?MgCl2(aq)+H2(g); ?H= careful in Lab B. MGO(s) +2HCl2(aq)?MGCl2(aq)+H2O (g);?H= measured in Lab Use higher up two equations & thermochemical principles to painting change in henry : C. 2H2(s) +O2 (g) ?H2O (l); ?H=-571.6KJ Hesss Law of heat center to predict the enthalpy change of the reaction: D. 2Mg(s) +O2 (g) ?2MgO(s) Procedure Followed lab surgical process as outlined in Chemistry 1127 lab manual, prove #9. Results Table 1: water system Temperatures Calorimeter struggle #| Cold peeing Temp °C| igneous 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 turn out Capacity: 43°C/J Table 2: Mg chemical reaction Data Mg reaction| | test 1| discharge 2| ravel 3| Mg caboodle (g)| 0.1506| 0.1503| 0.1506| modify Calorimeter mass (g)| 30.84| 30.80| 30.82| 0.10 M HCl mass (g)| 25.45| 24.79| 25.15| sign HCl Temperature (ºC)| 22.5| 22.7| 22.

5| plateau HCl Temperature (ºC)| 55.6| 45.4| 46.4| 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| run 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| 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 ignite 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 brace a full essay, order it on our website: Orderessay

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