1. Consider these three reactions as the elementary steps in the mechanism for a chemical reaction. ΔΗ = - 950 kJ ΔΗ = 575 kJ ΔΗ = - 825 kJ (i) Cl₂ (g) + Pt (s) → 2C1 (g) + Pt (s) (ii) Cl (g)+ CO (g) + Pt (s) → CICO (g) + Pt (s) (iii) Cl (g) + CICO (g) → Cl,CO (g) 2600 2400 2200 2000 1800 1600 1400 1200 1000 800 600 400 200 a. Draw the potential energy diagram for the reaction. Label the data points for clarity. The potential energy of the reactants is 600 kJ 0 -200 -400 -600 -800- Ea = 1550 kJ Ea = 2240 kJ Ea = 2350 kJ Reaction Progress b. What is the overall chemical equation? c. What is the overall change in enthalpy for the above chemical reaction?

1. Consider these three reactions as the elementary steps in the mechanism for a chemical reaction. ΔΗ = - 950 kJ ΔΗ = 575 kJ ΔΗ = - 825 kJ (i) Cl₂ (g) + Pt (s) → 2C1 (g) + Pt (s) (ii) Cl (g)+ CO (g) + Pt (s) → CICO (g) + Pt (s) (iii) Cl (g) + CICO (g) → Cl,CO (g) 2600 2400 2200 2000 1800 1600 1400 1200 1000 800 600 400 200 a. Draw the potential energy diagram for the reaction. Label the data points for clarity. The potential energy of the reactants is 600 kJ 0 -200 -400 -600 -800- Ea = 1550 kJ Ea = 2240 kJ Ea = 2350 kJ Reaction Progress b. What is the overall chemical equation? c. What is the overall change in enthalpy for the above chemical reaction?

Chemical Principles in the Laboratory

11th Edition

ISBN:9781305264434

Author:Emil Slowinski, Wayne C. Wolsey, Robert Rossi

Publisher:Emil Slowinski, Wayne C. Wolsey, Robert Rossi

Chapter42: Rate Studies On The Decomposition Of Aspirin

Section: Chapter Questions

Problem 1ASA

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Potential Energy (kJ) 1. Consider these three reactions as the elementary steps in the mechanism for a chemical reaction. (i) Cl₂ (g) + Pt (s) → 2Cl (g) + Pt (s) AH = -950 kJ Ea = 1550 kJ Ea = 2240 kJ (ii) Cl (g)+ CO (g) + Pt (s) → CICO (g) + Pt (s) AH = 575 kJ (iii) Cl (g) + CICO (g) → Cl₂CO (g) Ea = 2350 kJ AH = -825 kJ 2600 2400 2200 2000 a. Draw the potential energy diagram for the reaction. Label the data points for clarity. The potential energy of the reactants is 600 kJ 1800 1600 1400 1200 1000 800 600 400 200 0 -200- -400 -600- -800 Reaction Progress
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