Equilibria (triple) quiz Loading... 1. What does this diagram represent?Energy level diagram for an exothermic reactionEnergy level diagram for an endothermic reactionReaction profile for an exothermic reactionReaction profile for an endothermic reactionQuestion 1 of 15 Loading... 2. What does this symbol represent?Dynamic equilibriumReversible reactionRate of forward reaction equals rate of backwards reactionYield of reaction is the same both waysQuestion 2 of 15 Loading... 3. What is meant by the term activation energy?The maximum energy of the final product for it to be stableThe energy released by the reactionThe energy provided by the catalyst to allow a reaction to proceedThe minimum energy that the particles in collision must have if a reaction is going to occurQuestion 3 of 15 Loading... 4. Explain the effects of increasing the concentration of solutions on the rate of a reaction in terms of particle collision theory1) more particles in same space 2) more frequent collisions 3) increase rate of reaction1) more particles in same space 2) more frequent collisions 3) decrease rate of reaction1) more particles in same space 2) less frequent collisions 3) increase rate of reaction1) more particles in same space 2) less frequent collisions 3) decrease rate of reactionQuestion 4 of 15 Loading... 5. What will happen to the equilibrium position when the temperature is increased? Give a reason for your prediction. CH₄(g) + H₂O(g) ⇋ CO(g) + 3H₂(g) ΔH = +210 kJ mol⁻1Equilibrium will move to the right because the forward reaction is exothermicEquilibrium will move to the left because the forward reaction is endothermicEquilibrium will move to the right because the forward reaction is endothermicEquilibrium will move to the left because the forward reaction is exothermicQuestion 5 of 15 Loading... 6. Describe the chemical test for waterAdd it to anhydrous potassium permanganate which will turn from white to purple if water is presentFind the melting point. If it is 0 ⁰C then water is presentFind the boiling point. If it is 100 ⁰C water is presentAdd it to anhydrous copper(II) sulfate which will change from white to blue if water is presentQuestion 6 of 15 Loading... 7. State two features of a reaction that is in dynamic equilibrium1) The rate of the forward reaction is greater than the rate of the backward reaction. 2) there is no overall change in concentrations1) The concentrations of products and reactants are equal. 2) the rate of the forward reaction is equal to the rate of the backward reaction1) The rate of the forward reaction is equal to the rate of the backward reaction. 2) There is no overall change in concentrations.1) The equilibrium is on the right hand side producing a greater concentration of product than reactant. 2) The rate of the forward reaction is equal to the rate of the backward reactionQuestion 7 of 15 Loading... 8. What is meant by the term exothermic?A reaction which will only be spontaneous at warm temperatures (above 100⁰C)A reaction in which heat energy is given out (surroundings get hotter)A reaction in which heat energy is taken in (surroundings get colder)A reaction which will only be spontaneous at cold temperatures (below 0⁰C)Question 8 of 15 Loading... 9. Explain why experimental values of enthalpy change differ from theoretical valuesHeat energy is lost to the surroundings. Not all the reactants are used up.Different equipment produces different results. Heat energy is lost to the surroundings. Not all the reactants are used upDifferent equipment produces different results. Heat energy is lost to the surroundingsDifferent equipment produces different results. Not all the reactants are used upQuestion 9 of 15 Loading... 10. What name is given to the movement of gases?DecompositionCondensationDiffusionCombustionQuestion 10 of 15 Loading... 11. Why a catalyst does not affect the position of equilibrium in a reversible reaction?A reaction in dynamic equilibrium already has the lowest possible activation energyA catalyst has no effect on a forward or backward reactions if it is in dynamic equilibriumIf a reversible reaction is in dynamic equilibrium, a catalyst increases the rate of the forward reaction and the rate of the backward reaction by the same amount, so the position of equilibrium is unaffectedA catalyst reduces the activation energy, and is not used upQuestion 11 of 15 Loading... 12. For a reversible reaction to reach dynamic equilibria, where must the reaction take place?At constant pressureIn a warm environment (above 0⁰C)In a sealed containerIn a cool environment (below 0⁰C)Question 12 of 15 Loading... 13. Ammonia and hydrogen chloride react together in a reversible reaction to produce a white solid. What are the word and symbol equations?ammonia + hydrogen chloride ⇌ ammonium hydrochloride NH₃ + HCl ⇌ NH₃ClHammonia + hydrogen chloride ⇌ ammonium chloride NH₃ + HCl ⇌ NH₄Clammonia + hydrogen chloride ⇌ ammonium chloride + water NH₃ + HCl ⇌ NH₄Cl + H₂O ammonia + hydrogen chloride ⇌ ammonium chloride + hydrogen 2NH₃ + 2HCl ⇌ 2NH₃Cl + H₂Question 13 of 15 Loading... 14. What is a catalyst?A substance that slows down a chemical reaction but is chemically unchanged at the end of the reactionA substance that speeds up a chemical reaction but is chemically unchanged at the end of the reactionA substance that helps dissolve insoluble reagents to speed up the rate of reactionA substance that speeds up a chemical reaction but is used up as the reaction proceedsQuestion 14 of 15 Loading... 15. In the thermal decomposition of calcium carbonate, we might expect 50g of calcium carbonate to produce 28g of calcium oxide. If instead only 24g of calcium oxide is produced, what is the percentage yield?85.7 %56 %0.857 % 0.56 %Question 15 of 15 Loading... Related Posts:The entire quiz question bank!The entire quiz question bank (Double only)!Key Calculations quizCondensation Polymers quizElectrolysis quizAlcohols & Carboxylic Acids quiz Hydr0Gen2020-02-16T17:37:02+00:00Categories: Uncategorized|Tags: Quiz, Topic: Equilibria| Share This Story, Choose Your Platform! FacebookXRedditLinkedInTumblrPinterestVkEmail