Zinc metal reacts with HCI according to the following balanced equation: Zn(s) + 2HCI(aq) --> ZnCl2(aq) + H2(g) When 0.100 grams of Zn(s) is combined with an excess amount of HCI to make 47.0 mL of solution in a coffee-cup calorimeter, all the zinc reacts, raising the temperature of the solution from 21.90°C to 24.70°C. Find AH for this reaction in kJ/mol. Assume the density of the solution is 1.03 g/mL and the specific heat capacity of the solution is 4.184 J/g°C. Use an atomic weight of 65.38 g/mol for Zn Hints: -q(reaction) = q(solution) AH = q/mol of limiting reagent Do not type units with your answer. Type your answer to three significant figures. If this question is on an exam on your scrap paper report your answer to the proper number of significant figures but still type three significant figures online.

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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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Zinc metal reacts with HCI according to the following balanced equation:
Zn(s) + 2HCI(aq)
> ZnCl2(aq) + H2(g)
-->
When 0.100 grams of Zn(s) is combined with an excess amount of HCI to make 47.0
mL of solution in a coffee-cup calorimeter, all the zinc reacts, raising the temperature
of the solution from 21.90°C to 24.70°C. Find AH for this reaction in kJ/mol.
Assume the density of the solution is 1.03 g/mL and the specific heat capacity of the
solution is 4.184 J/g°C.
Use an atomic weight of 65.38 g/mol for Zn
Hints:
-q(reaction) = q(solution)
AH = q/mol of limiting reagent
Do not type units with your answer.
Type your answer to three significant figures.
If this question is on an exam on your scrap paper report your answer to the proper
number of significant figures but still type three significant figures online.
Transcribed Image Text:Zinc metal reacts with HCI according to the following balanced equation: Zn(s) + 2HCI(aq) > ZnCl2(aq) + H2(g) --> When 0.100 grams of Zn(s) is combined with an excess amount of HCI to make 47.0 mL of solution in a coffee-cup calorimeter, all the zinc reacts, raising the temperature of the solution from 21.90°C to 24.70°C. Find AH for this reaction in kJ/mol. Assume the density of the solution is 1.03 g/mL and the specific heat capacity of the solution is 4.184 J/g°C. Use an atomic weight of 65.38 g/mol for Zn Hints: -q(reaction) = q(solution) AH = q/mol of limiting reagent Do not type units with your answer. Type your answer to three significant figures. If this question is on an exam on your scrap paper report your answer to the proper number of significant figures but still type three significant figures online.
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