62. Consider the reaction 2POCI;(g) → 2PCI,(g) + O2(g) a. Calculate AG° for this reaction. The AG; values for POCI;(g) and PCI3(g) are –502 kJ/mol and –270. kJ/mol, respectively. b. Is this reaction spontaneous under standard conditions at 298 K? c. The value of AS° for this reaction is 179 J/K · mol. At what temperatures is this reaction spontaneous at standard conditions? Assume that AH and AS° do not depend on temperature.

62. Consider the reaction 2POCI;(g) → 2PCI,(g) + O2(g) a. Calculate AG° for this reaction. The AG; values for POCI;(g) and PCI3(g) are –502 kJ/mol and –270. kJ/mol, respectively. b. Is this reaction spontaneous under standard conditions at 298 K? c. The value of AS° for this reaction is 179 J/K · mol. At what temperatures is this reaction spontaneous at standard conditions? Assume that AH and AS° do not depend on temperature.

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

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Concept explainers

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".

Question

62. Consider the reaction
2POCI;(g) → 2PCI,(g) + O2(g)
a. Calculate AG° for this reaction. The AG; values for
POCI;(g) and PCI3(g) are –502 kJ/mol and –270. kJ/mol,
respectively.
b. Is this reaction spontaneous under standard conditions at
298 K?
c. The value of AS° for this reaction is 179 J/K · mol. At
what temperatures is this reaction spontaneous at standard
conditions? Assume that AH and AS° do not depend on
temperature.

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