A A strip of magnesium metal having a mass of 1.22 g dissolves in 100.0 mL of 6.02 M HCI, which has a density of 1.10 g/mL. The hydrochloric acid is initially at 23.0°C, and the resulting solution reaches a final temperature of 45.5°C. The heat capacity of the calorimeter in which the reaction occurs is 562 J/°C. Calculate AH (in kJ/mol) for the reaction under the conditions of the experiment, assuming the specific heat of the final solution is the same as that for water, 4.184 J/g°C. (Report numerical answer 4 significant figures) Mg(s) + 2HCI(aq) -> MgCl2(aq)+ H2(g)
A A strip of magnesium metal having a mass of 1.22 g dissolves in 100.0 mL of 6.02 M HCI, which has a density of 1.10 g/mL. The hydrochloric acid is initially at 23.0°C, and the resulting solution reaches a final temperature of 45.5°C. The heat capacity of the calorimeter in which the reaction occurs is 562 J/°C. Calculate AH (in kJ/mol) for the reaction under the conditions of the experiment, assuming the specific heat of the final solution is the same as that for water, 4.184 J/g°C. (Report numerical answer 4 significant figures) Mg(s) + 2HCI(aq) -> MgCl2(aq)+ H2(g)
Chemistry & Chemical Reactivity
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Chapter5: Principles Of Chemical Reactivity: Energy And Chemical Reactions
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Problem 41PS: Adding 5.44 g of NH4NO3(s) to 150.0 g of water in a coffee-cup calorimeter (with stirring to...
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A strip of magnesium metal having a mass of 1.22 g dissolves in 100.0 mL of 6.02 M HCI, which has a density of
1.10 g/mL. The hydrochloric acid is initially at 23.0°C, and the resulting solution reaches a final temperature
of 45.5°C. The heat capacity of the calorimeter in which the reaction occurs is 562 J/"C. Calculate AH (in kJ/mol)
for the reaction under the conditions of the experiment, assuming the specific heat of the final solution is the
same as that for water, 4.184 J/g°C. (Report numerical answer 4 significant figures)
Mg(s) + 2HC((aq) -> MgCl2(aq)+ H2(9)
В
From the following enthalpies of reaction,
4HCI(g) + 02(g) -> 2H20) + 2C12(g)
AH = -202.4 kJ/mol rxn
1/2 H2(g) + 1/2 F2(g) -> HF
AH = -600.0 kJ/mol rxn
%3D
H2(g) + 1/2 02(g) -> H201)
AH = -285.8 kJ/mol rxn
find AHrxn (in kJ/mol) for 2HCI(g) + F2(g) > 2HF) + Cl2(9). (Report numerical answer in 4 significant figures)
A particular ore of lead, galena, is 10.0% lead sulfide, PbS, and 90.0% impurities by weight. What mass (in g) of
lead is contained in 110.5 grams of this ore? (Put numerical answer in significant figures)
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