1. Assume that the reaction fort he formation of gaseous hydrogen fluoride (HF) from hydrogen and fluoride has an equilibrium constant of Kc = 1.15x102 at a certain temperature. H2(g) + F2(g) + 2HF(g) In a particular experiment, 3.00 moles of each component were added to a 1.50 L flask. a) Calculate the reaction quotient, Qc, b) Calculate the equilibrium concentrations of all species.

Sulfur dioxide and oxygen react to form sulfur trioxide, like this: 2 SO₂(g) + O₂(g) → 2 SO 3(g) The reaction is exothermic. Suppose a mixture of SO2, O₂ and SO3 has come to equilibrium in a closed reaction vessel. Predict what change, if any, the perturbations in the table below will cause in the composition of the mixture in the vessel. Also decide whether the equilibrium shifts to the right or left. perturbation The temperature is lowered. change in composition The pressure of SO3 will The temperature is raised. The pressure of SO₂ will ? ? î ↑ shift in equilibrium O X to the right to the left (none) to the right to the left (none) S

Consider the following reaction: CO(g) + H₂O(g) = CO₂(g) + H₂(g). Exactly 200 torr each of CO and water vapor were introduced into a 500 ml flask. When the mixture reached equilibrium at 800 K, the partial pressure of CO2 was found to be 99 torr. Calculate the value of Kp.

Nitrogen and hydrogen react to form ammonia, like this: N,(9)+3H,(g) → 2 NH3(g) The reaction is exothermic. Suppose a mixture of N,, H, and NH, has come to equilibrium in a closed reaction vessel. Predict what change, if any, the perturbations in the table below will cause in the composition of the mixture in the vessel. Also decide whether the equilibrium shifts to the right or left. olo perturbation change in composition shift in equilibrium Ar to the right The temperature is lowered. to the left The pressure of N2 will (none) to the right to the left The temperature is raised. The pressure of NH3 will v ? go up. (none) go down. not change. ?