Rates, equilibrium, energy

Question 1 of 10

For 2SO₂ + O₂ ⇌ 2SO₃ (ΔH negative), the yield of SO₃ is increased by

Question 2 of 10

A reaction rate doubles for every 10 °C rise. Raising the temperature by 30 °C increases the rate by a factor of

Question 3 of 10

If 0.2 mol each of H₂ and I₂ are in equilibrium with 1.4 mol HI in 1 dm³, Kc is

Question 4 of 10

Powdered marble reacts faster with acid than lumps because it has

Question 5 of 10

For N2 + 3H2 ⇌ 2NH3, increasing the pressure shifts the equilibrium to the

Question 6 of 10

Kc for H₂ + I₂ ⇌ 2HI is

Question 7 of 10

Using bond energies C–H 413, O=O 498, C=O 805, O–H 464 kJ/mol, ΔH for CH₄ + 2O₂ → CO₂ + 2H₂O is about

Question 8 of 10

Increasing temperature increases reaction rate mainly because

Question 9 of 10

In an exothermic reaction, ΔH is

Question 10 of 10

In the Haber process, the catalyst is