5.99 From the enthalpy of formation for CO, and thefollowing information, calculate the standard enthalpyof formation for carbon monoxide (CO).CO(g) + 0,(g)→ CO2(g)AH° = -283.0 kJ/molWhy can't we obtain the standard enthalpy of formationdirectly by measuring the enthalpy of the followingreaction?C(graphite) + }O,(g)CO(g)

Given data: ∆H°=-283 kj/mol From standard table; ∆Hf°(CO2(g) is given by, ∆Hf°=-393.5 kj/mol

Answered: 5.99 From the enthalpy of formation for…

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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A chemist carefully measures the amount of heat needed to raise the temperature of a 242.0 mg sample of C,H,O, from 52.7 °C to 65.5 °C. The experiment shows that 5.29 J of heat are needed. What can the chemist report for the molar heat capacity of C¼H,O,? Round your answer to 3 significant digits. 4 J• mol - 1 •K
Calculate the standard enthalpy of formation for diamond given the following reactions and using Hess’s Law: C(graphite) + O2(g) --> CO2(g) ΔH = -393.5 kJ/rxn C(diamond) + O2(g) --> CO2(g) ΔH = -395.4 kJ/rxn
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When 1.42 g of iron reacts with 1.80 g of chlorine, 3.22 g of iron(II) chloride (FeCl2, molar mass = 126.75 g/mol) and 6.8 kJ of heat is produced. What is the enthalpy change for the reaction when 1 mole of iron(II) chloride is produced? round to sig figs
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From the following data, C (graphite) + O₂(g) → CO₂(g) H₂(g) + —⁄- 02₂(g) → H₂O (1) CH₂(g) + 20₂(g) → CO₂(g) + 2H₂O (1) kJ ×10 Calculate the enthalpy change for the reaction below: C(graphite) + 2H₂(g) CH4 (g) Be sure your answer has the correct number of significant digits. X → ΔΗ° S rxn ΔΗ° = -285.8 rxn = -393.5 ΔΗ° = -890.4 rxn kJ mol kJ mol kJ mol
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2. Slaked lime (Ca(OH)2(s)) is produced when lime (calcium oxide, Cao (s)) reacts with liquid water. 65.2 kJ of heat is released for each mol of Ca(OH)2 that is produced. (a) Write a thermochemical equation for the reaction. (b) What is the enthalpy change when 523.3 kg of lime reacts with excess water?

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