Zinc metal reacts with HCl according to the following balanced equation: Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g) When 0.130 grams of Zn(s) is combined with an excess amount of HCl to make 48.0 mL of solution in a coffee-cup calorimeter, all the zinc reacts, raising the temperature of the solution from 21.70ºC to 24.00ºC. Find ΔH for this reaction in kJ/mol. Assume the density of the solution is 1.01 g/mL and the specific heat capacity of the solution is 4.184 J/gºC. Use an atomic weight of 65.38 g/mol for Zn
Zinc metal reacts with HCl according to the following balanced equation: Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g) When 0.130 grams of Zn(s) is combined with an excess amount of HCl to make 48.0 mL of solution in a coffee-cup calorimeter, all the zinc reacts, raising the temperature of the solution from 21.70ºC to 24.00ºC. Find ΔH for this reaction in kJ/mol. Assume the density of the solution is 1.01 g/mL and the specific heat capacity of the solution is 4.184 J/gºC. Use an atomic weight of 65.38 g/mol for Zn
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Question 13 (Ch.7)
Zinc metal reacts with HCl according to the following balanced equation:
Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g)
When 0.130 grams of Zn(s) is combined with an excess amount of HCl to make 48.0 mL of solution in a coffee-cup calorimeter, all the zinc reacts, raising the temperature of the solution from 21.70ºC to 24.00ºC. Find ΔH for this reaction in kJ/mol.
Assume the density of the solution is 1.01 g/mL and the specific heat capacity of the solution is 4.184 J/gºC.
Use an atomic weight of 65.38 g/mol for Zn
Hints:
-q(reaction) = q(solution)
ΔH = q/mol of limiting reagent
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