Chemistry & Chemical Reactivity
10th Edition
ISBN: 9781337399074
Author: John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher: Cengage Learning
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Textbook Question
Chapter 5, Problem 52PS
You wish to know the enthalpy change for the formation of liquid PCl3 from the elements.
P4(s) + 6 Cl2(g) → 4 PCl3(ℓ) ΔrH° = ?
The enthalpy change for the formation of PC15 from the elements can be determined experimentally, as can the enthalpy change for the reaction of PCl3 (ℓ) with more chlorine to give PCl5(s):
P4(s) + 10 Cl2(g) → 4 PCl5(s)
ΔrH° = –1774.0 kJ/mol-rxn
PCl3(ℓ) + Cl2(g) → PC15(s)
ΔrH° = –123.8 kJ/mol-rxn
Use these data to calculate the enthalpy change for the formation of 1.00 mol of PCl3(ℓ) from phosphorus and chlorine.
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Curved arrows are used to illustrate the flow of electrons. Using the provided starting and product structures, draw the curved electrons-pushing arrows for the following reaction or mechanistic step(s).
Chapter 5 Solutions
Chemistry & Chemical Reactivity
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