Chemical equilibrium and Le Chatelier's principle

Question 1 of 10

For an exothermic forward reaction, lowering the temperature increases Kc.

Question 2 of 10

For H₂ + I₂ ⇌ 2HI, the equilibrium concentrations are [H₂] = 0.1, [I₂] = 0.2 and [HI] = 0.2 mol/dm³. Find Kc.

Question 3 of 10

A catalyst increases the yield at equilibrium.

Question 4 of 10

The equilibrium N₂O₄ ⇌ 2NO₂ (ΔH positive) becomes darker brown when

Question 5 of 10

For H₂ + I₂ ⇌ 2HI, the equilibrium concentrations are [H₂] = 0.4, [I₂] = 0.1 and [HI] = 0.8 mol/dm³. Find Kc.

Question 6 of 10

Increasing the concentration of a reactant shifts equilibrium to the right.

Question 7 of 10

An equilibrium in which reactants and products are in the same phase is ___ equilibrium.

Question 8 of 10

The only factor that changes the value of Kc is

Question 9 of 10

For N₂ + 3H₂ ⇌ 2NH₃ (ΔH negative), increasing the temperature

Question 10 of 10

Explain why, in industry, a catalyst is used in reversible reactions even though it does not change the position of equilibrium.