1) What’s the correct expression for the following equilibrium: H2 + I2 ↔ 2HI a) b) c) d) 2) What’s the correct expression for the following equilibrium: 3A2 + 2B ↔ 4C +D2 a) b) c) d) 3) Kc = 200mol-1dm3, 2SO2 +O2 ↔ 2SO3, ∆H is negative. What will happen to Kc if I increase the temperature? a) It will stay the same b) It will get bigger c) It will get smaller d) I don't know 4) Kc = 0.5mol-1dm3, PCl5 ↔ PCl3 +Cl2 ∆H is positive. What will happen to Kc if I decrease the temperature? a) It will stay the same b) It will get bigger c) It will get smaller d) I don't know 5) What will happen to Kc when an iron catalyst is added to the following equilibrium: 2NH3 ↔ N2 + 3H2, ∆H is positive. a) It will increase b) It will decrease c) It will stay the same d) I don't know 6) For the following equilibrium aA + bB ⇌ cC Kc = a) [A]a [B]b/ [C]c b) [C]c/ [A]a [B]b 7) What is a homogeneous equilibrium? a) Only one reactant is decomposing into products b) reactants and products in different states c) reactants and products in the same state d) only one product is formed 8) When Kc is less than 1 the equilibrium... a) lies to the right b) is in the middle c) lies to the left 9) When Kc is greater than 1 the equilibrium... a) lies to the right b) is in the middle c) lies to the left 10) When Kc is equal to 1 the equilibrium... a) lies to the right b) is in the middle c) lies to the left 11) For an exothermic reaction, increasing the temperature... a) increases Kc b) decreases Kc c) doesn't change Kc 12) For an exothermic reaction, decreasing the temperature... a) increases Kc b) decreases Kc c) doesn't change Kc 13) For an endothermic reaction, decreasing the temperature... a) increases Kc b) decreases Kc c) doesn't change Kc 14) For an endothermic reaction, increasing the temperature... a) increases Kc b) decreases Kc c) doesn't change Kc 15) For reaction involving more moles of product gas that reactants... a) increases Kc b) decreases Kc c) doesn't change Kc

Equilibrium Constant Kc

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