H2C204(s) + 2 NaOH(aq) → Na2 C204(ag) + 2 H2O(1)AHreaction = ???What is the (experimental) enthalpy change for this reaction, AH.reaction"? (Use the total mass of solutionand 4.18 J/(g °C) for the specific heat of the solution in your calculations.)kJ/mol A styrofoam calorimeter contains 70.0 mL of 2.50 M NAOH at 20.3°C. When 10.28g H,C,0, is added to the calorimeter, the temperature of the resulting solutionincreases to a maximum of 44.7°C. The reaction that occurs is:

Given reaction between oxalic acid and sodium hydroxide as follows: H2C2O4 (s) + 2NaOH (aq)→ Na2C2O4 (aq) + 2H2O (l) Concentration of NaOH solution = 2.50 M, volume = 70.0 mL = 0.07 L. Mass of H2C2O4 =10.28 g The specific heat of solution = 4.18 J/g⁰C, Initial temperature, Ti = 20.3⁰C, Final temperature Tf=44.7⁰C Hence, change in temperature ∆T = Tf-Ti = 44.7⁰C-20.3⁰C = 24.4⁰C Now, moles of NaOH =molarity × volume = 2.50 mol/L ×0.07L =0.175 mol Molar mass of NaOH = 40 g/mol, Hence, mass of NaOH = moles× molar mass = 0.175 mol ×40 g/mol = 7g Total mass of solution = mass of H2C2O4 + mass of NaOH = 10.28 g+ 7 g = 17.28 gNow, heat change is calculated as: Q= m×c×∆T Putting the values, the heat released is obtained as: Q= 17.28g×4.18 J/g⁰C×24.4⁰C Q= 1762.42 J Q=1.7642 kJ Now, enthalpy of a neutralization reaction is negative of heat released so as: ∆H= -Q. The reaction here involves 2 mol of NaOH solution so, enthalpy change of reaction is: ∆H = -Q2 =-1.7642 kJ2 mol=-0.8821 kJ/mol Hence, change in enthalpy of reaction is -0.8821 kJ/mol.

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H2C204(s) + 2 NaOH(aq) → Na2 C204(ag) + 2 H20(1) AHreaction = ??? What is the (experimental) enthalpy change for this reaction, AH reaction ? (Use the total mass of solution and 4.18 J/(g °C) for the specific heat of the solution in your calculations.) kJ/mol

H2C204(s) + 2 NaOH(aq) → Na2 C204(ag) + 2 H20(1) AHreaction = ??? What is the (experimental) enthalpy change for this reaction, AH reaction ? (Use the total mass of solution and 4.18 J/(g °C) for the specific heat of the solution in your calculations.) kJ/mol

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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