Thé molecule OH is a free radical called detergent It reacts with many hydrocarbons or othermolecules that enter the atmosphere tooxidize them into forms that can be removedfrom the atmosphere. It is present in very lowconcentrations at all times in theatmosphere, so the thermodynamics of itsproduction is difficult to measure directly.To. Considering the enthalpy of the followingreactions, determine the AH of the reaction:b) In which of the reactions listed (1 - 4)would AH be an enthalpy of formation, AfH°, and in which AH would be defined asAHdissociation (also known as bindingenergy) Н2О (g) — Н (g) + ОН (9)Reaction 1: 1 H2 (g) + 1 О2 (g) — ОН (g)AH1 = 38.95 kJReaction 2: H2 (g) + ½ O2 (g)H20 (g)AH2 = – 241.8 kJReaction 3: H2 (g) → 2 H (g)AH3 = 496.0 kJReaction 4: O2 (g) → 2 O (g)AH4 = 498.3 kJ

The balanced chemical reaction involves the number of atoms associated with the reactants should be…

H2O (g) → H (g) + OH (g) Reaction 1: 2 H2 (g) + ½ O2 (g) → OH (g) AH1 = 38.95 kJ Reaction 2: H2 (g) + ½ O2 (g) –→ H2O (g) AH2 = – 241.8 kJ Reaction 3: H2 (g) → 2 H (g) AH3 = 496.0 kJ Reaction 4: O2 (g) → 20 (g) AH4 = 498.3 kJ %3D

H2O (g) → H (g) + OH (g) Reaction 1: 2 H2 (g) + ½ O2 (g) → OH (g) AH1 = 38.95 kJ Reaction 2: H2 (g) + ½ O2 (g) –→ H2O (g) AH2 = – 241.8 kJ Reaction 3: H2 (g) → 2 H (g) AH3 = 496.0 kJ Reaction 4: O2 (g) → 20 (g) AH4 = 498.3 kJ %3D

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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