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Complete the table to show what would happen to the position of the following gas phase equilibria changes were made. Tick the correct column in each case.

Equilibrium

2 A(g) + B(g) ⇌ X(g) + Z(g)

A(g) + B(g) ⇌ X(g) + Z(g)

B(g) ⇌ X(g) + Z(g) + Y(g)

X(g) + Y(g) ⇌ 2 B(g)

2 X(g) ⇌ 2 A(g) + B(g)

2) Sulfur trioxide is made by the following reaction. The forward reaction is exothermic.

dynamic equilibrium in a closed system.

a) i) What is a closed system?



ii) What are the features of a system in a state of dynamic equilibrium?

1

2

3

4

b) i) If the temperature of this equilibrium was increased, what would happen to the yield of sulfur trioxide?



ii) Explain your reasoning.





c) i) If the pressure of this equilibrium was increased, what would happen to the yield of sulfur trioxide?



ii) Explain your reasoning.





d) i) If more oxygen was added to the mixture, what would happen to the yield of sulfur trioxide?



26-Jun-2015

Complete the table to show what would happen to the position of the following gas phase equilibria

changes were made. Tick the correct column in each case.

∆H

Increase temperature Increase pressure

moves

left

no

move

move

right

moves

left

no

move

move

right

exothermic

endothermic

exothermic

exothermic

endothermic

trioxide is made by the following reaction. The forward reaction is exothermic. This reaction reaches a state of

dynamic equilibrium in a closed system.

2 SO2

(g) + O2(g) ⇌ 2 SO3(g)

What is a closed system?



What are the features of a system in a state of dynamic equilibrium?



2



4

If the temperature of this equilibrium was increased, what would happen to the yield of sulfur trioxide?



Explain your reasoning.





e of this equilibrium was increased, what would happen to the yield of sulfur trioxide?



Explain your reasoning.





If more oxygen was added to the mixture, what would happen to the yield of sulfur trioxide?



LE CHATELIER’S PRINCIPLE 2

Chemsheets AS 1039

Complete the table to show what would happen to the position of the following gas phase equilibria if the following

Increase pressure Remove some of B

move

right

moves

left

no

move

move

right

This reaction reaches a state of

What is a closed system? .



.***

2 .**

.**

4 .***

If the temperature of this equilibrium was increased, what would happen to the yield of sulfur trioxide?

.

Explain your reasoning. .

.

.

e of this equilibrium was increased, what would happen to the yield of sulfur trioxide?

.

Explain your reasoning. .

.

.

If more oxygen was added to the mixture, what would happen to the yield of sulfur trioxide?

.

LE CHATELIER’S PRINCIPLE 2

© www.CHEMSHEETS.co.uk 26-Jun-2015 Chemsheets AS 1039

ii) Explain your reasoning. ..

..

.***.

3) When bismuth chloride is added to water, a reaction occurs and a white precipitate forms. The following equilibrium is

set up. What would be the effect on the amount of precipitate if sodium hydroxide solution is added to the mixture

(explain your answer)?

BiCl3

(aq) + H2O(l) ⇌ BiOCl(s) + 2 HCl(aq)