2.The equilibrium constant, Ke, of the following reaction at certain temperature is 0.0400 mol dm3.PCIS(g) 2 PCI3(g) + Cl2(g)Now we have 3.00 mole of PCI3(g) and 2.00 mole of Cl2(g) placed in a 2.00 dm³ vessel.(a) Calculate the equilibrium concentrations of all species in the vessel.(b) In a reaction mixture at the same temperature, the concentrations of the species are now asfollows:SpeciesPCISPCI3Cl2Concentration (mol dm3)0.1500.03000.210(i) Calculate the reaction quotient, Qc, of the system and decide whether the system is atequilibrium.(ii) If the system is not at equilibrium, in which direction will a net reaction proceed? Explain youranswer.(c) It is known that the reaction is endothermic. Predict the change of equilibrium constant if(i) the temperature is increased;(ii) more PCI3(g) is added to the vessel.

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Answered: The equilibrium constant, Ke, of the…

The equilibrium constant, Ke, of the following reaction at certain temperature is 0.0400 mol dm3. PCIS(g) 2 PCI3(g) + Cl2(g)

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter12: Chemical Equilibrium

Section: Chapter Questions

Problem 61QRT

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Question

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2.
The equilibrium constant, Ke, of the following reaction at certain temperature is 0.0400 mol dm3.
PCIS(g) 2 PCI3(g) + Cl2(g)
Now we have 3.00 mole of PCI3(g) and 2.00 mole of Cl2(g) placed in a 2.00 dm³ vessel.
(a) Calculate the equilibrium concentrations of all species in the vessel.
(b) In a reaction mixture at the same temperature, the concentrations of the species are now as
follows:
Species
PCIS
PCI3
Cl2
Concentration (mol dm3)
0.150
0.0300
0.210
(i) Calculate the reaction quotient, Qc, of the system and decide whether the system is at
equilibrium.
(ii) If the system is not at equilibrium, in which direction will a net reaction proceed? Explain your
answer.
(c) It is known that the reaction is endothermic. Predict the change of equilibrium constant if
(i) the temperature is increased;
(ii) more PCI3(g) is added to the vessel.

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