Changes Which Affect the Equilibrium (AQA A-Level Chemistry): Quizzes

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Changes Which Affect the Equilibrium
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Which factor is the only one that affects the value of KcK_c?

Temperature

What happens to KcK_c when temperature increases for an exothermic reaction (ΔH<0\Delta H < 0)?

KcK_c decreases

What happens to KcK_c when temperature decreases for an exothermic reaction?

KcK_c increases

What happens to KcK_c when temperature increases for an endothermic reaction (ΔH>0\Delta H > 0)?

KcK_c increases

What effect does decreasing temperature have on KcK_c for an endothermic reaction?

KcK_c decreases

For 2SO2(g)+O2(g)2SO3(g)2SO_2(g) + O_2(g) \rightleftharpoons 2SO_3(g) (ΔH=197\Delta H = -197 kJ/mol), what happens to KcK_c when temperature increases?

Decreases KcK_c

Do changes in concentration of reactants or products affect KcK_c?

No

Does adding a catalyst change the value of KcK_c?

No

When temperature increases in an exothermic reaction, which direction does equilibrium shift?

Reverse (left)

What does a catalyst do to the forward and reverse reactions?

Speeds up both equally

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