Chemical Equilibrium Livestream | Post UTME candidates

— CHEMICAL EQUILIBRIUM TUTORIALS 1. What is the expression for Kₑ in the following reaction? 2E(g) + F(g) ⇌ 2G(g) A. [G] / 2[E][F] B. 2[G] / 2[E][F] C. [G]² / 2[E][G] D. [G]² / [E]²[F]✅ 2. E(g) + F(g) ⇌ 2G(g), ∆H is negative. Which of the following will increase the yield of G? A. Removing some G✅ B. Using a larger closed vessel C. Adding a positive catalyst D. Increasing the temperature 3. 2SO₂(g) + O₂(g) ⇌ 2SO₃(g), ∆H = –198 kJ mol⁻¹. Which of the following changes the value of the equilibrium constant for the reaction above? A. Increasing the surface area of vessel B. Adding a catalyst to the system C. Increasing the pressure of the system D. Increasing the temperature of the system✅ 4. X₂(g) + Y₂(g) ⇌ 2XY(g) ∆H is positive. Which of the following statements about the system above is correct? A. The reverse reaction is endothermic B. Pressure has no effect on the equilibrium mixture✅ C. At equilibrium, decrease in temperature favours the forward reaction D. The reaction goes to completion at equilibrium 5. The reaction represented by the equation below occurred in a sealed glass tube: Y₂Z₄(g) ⇌ 2YZ₂(g), ∆H = +x kJ mol⁻¹ What happens when the temperature is increased at equilibrium? A. The concentration of YZ₂ increases✅ B. The concentration of Y₂Z₄ increases C. The YZ₂ reacts with the Y D. Pressure of the system increases 6. Which of the following chemical equilibria is displaced to the left as a result of a decrease in pressure at constant temperature? A. N₂(g) + 3H₂(g) ⇌ 2NH₃(g)✅ B. H₂(g) + Cl₂(g) ⇌ 2HCl(g) C. 2O₃(g) ⇌ 3O₂(g) D. PCl₅(g) ⇌ PCl₃(g) + Cl₂(g)