Zinc metal reacts with hydrochloric acid according to the following balanced equation: Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g)Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g) When 0.122 gg of Zn(s)Zn(s) is combined with enough HClHCl to make 50.9 mLmL of solution in a coffee-cup calorimeter, all of the zinc reacts, raising the temperature of the solution from 21.5 ∘C∘C to 24.2 ∘C∘C. Find ΔHrxnΔHrxn for this reaction as written. (Use 1.00 g/mLg/mL for the density of the solution and 4.18 J/(g⋅∘C)J/(g⋅∘C) as the specific heat capacity.) Express your answer in kilojoules per mole to two significant figures.
Zinc metal reacts with hydrochloric acid according to the following balanced equation: Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g)Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g) When 0.122 gg of Zn(s)Zn(s) is combined with enough HClHCl to make 50.9 mLmL of solution in a coffee-cup calorimeter, all of the zinc reacts, raising the temperature of the solution from 21.5 ∘C∘C to 24.2 ∘C∘C. Find ΔHrxnΔHrxn for this reaction as written. (Use 1.00 g/mLg/mL for the density of the solution and 4.18 J/(g⋅∘C)J/(g⋅∘C) as the specific heat capacity.) Express your answer in kilojoules per mole to two significant figures.
Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter4: Chemical Reactions In Solution
Section: Chapter Questions
Problem 4.22QE
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Zinc metal reacts with hydrochloric acid according to the following balanced equation:
Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g)Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g)
When 0.122 gg of Zn(s)Zn(s) is combined with enough HClHCl to make 50.9 mLmL of solution in a coffee-cup calorimeter, all of the zinc reacts, raising the temperature of the solution from 21.5 ∘C∘C to 24.2 ∘C∘C.
Find ΔHrxnΔHrxn for this reaction as written. (Use 1.00 g/mLg/mL for the density of the solution and 4.18 J/(g⋅∘C)J/(g⋅∘C) as the specific heat capacity.)
Express your answer in kilojoules per mole to two significant figures.
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