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At 390 K, the equilibrium constant, Kc, for the reaction below is 1.8 × 10–3. 1....

At 390 K, the equilibrium constant, Kc, for the reaction below is 1.8 × 10–3.

1. PCl5 (g) ⇔ PCl3 (g) + Cl2 (g)

Assume a quantity of PCl5 (g) is placed in a rigid 10 L vessel and the system is allowed to reach equilibrium at a constant temperature of 390 K. Identify whether each of the following statements is true or false.

a) At equilibrium, if the vessel contains 1 mole of PCl5 (g)it must contain 0.0428 mol Cl2 (g) and 0.0428 mol PCl3 (g).

TRUE

FALSE

b) If some of the equilibrium mixture is removed, a new equilibrium mixture will eventually form and the concentrations of the three components will be the same as for the original equilibrium mixture.

TRUE

FALSE

c) When the volume is halved the number of moles of Cl2 and PCl3 will increase until equilibrium is reached.

TRUE

FALSE

d) If the volume of the vessel is doubled, the value of the reaction quotient, Q, immediately after the change in volume will be 3.6 × 10–3.

TRUE

FALSE

e) Higher equilibrium concentrations of Cl2 and PCl3 will result if an inert gas is added to the vessel.

TRUE

FALSE
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Answer #1

(a) Pus (9) - a= [Pels I[UL] [PC] PU (9) + Cl, 19) 70.0428) (10.0428) volume - a in litres Collenben 0.0128mo each & and pclAll are false.

Comment in case of any doubt.

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