Equilibria (triple) quiz Loading... 1. What does this diagram represent?Energy level diagram for an exothermic reactionReaction profile for an exothermic reactionEnergy level diagram for an endothermic reactionReaction profile for an endothermic reactionQuestion 1 of 15 Loading... 2. What does this symbol represent?Reversible reactionDynamic equilibriumYield of reaction is the same both waysRate of forward reaction equals rate of backwards reactionQuestion 2 of 15 Loading... 3. In a calorimetry experiment to investigate the heat energy released by the combustion of ethanol, why should the water in the calorimeter be stirred?To ensure the container does not get too hotTo prevent the water from evaporatingTo allow the heat to spread evenly through the copper containerTo ensure the heat energy is mixed evenly throughout all the waterQuestion 3 of 15 Loading... 4. What colour is anhydrous copper (II) sulfate?CreamWhiteBluePurpleQuestion 4 of 15 Loading... 5. In a sealed container, a reversible reaction can reach a state of ______________________________Constant equilibriumVariable equilibriumStatic equilibriumDynamic equilibriumQuestion 5 of 15 Loading... 6. What is meant by the term activation energy?The minimum energy that the particles in collision must have if a reaction is going to occurThe energy released by the reactionThe energy provided by the catalyst to allow a reaction to proceedThe maximum energy of the final product for it to be stableQuestion 6 of 15 Loading... 7. 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 7 of 15 Loading... 8. Why a catalyst does not affect the position of equilibrium in a reversible reaction?A catalyst reduces the activation energy, and is not used upIf 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 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 equilibriumQuestion 8 of 15 Loading... 9. One feature of dynamic equilibrium is that the rate of the forward reaction is equal to the rate of the backward reaction. What is the other feature?There is no overall change in concentrationsThe concentration of the products is increasingThe yield of the backward reaction is greater than 50%The yield of the forwards reaction is greater than 50%Question 9 of 15 Loading... 10. What name is given to the movement of gases?DiffusionDecompositionCondensationCombustionQuestion 10 of 15 Loading... 11. What will happen to the equilibrium position when we add a catalyst? Give a reason for your prediction. A (g) + B (g) ⇋ C (g) (-∆H)Equilibrium will move to the right, because a catalyst increases the backward rate of reactionEquilibrium will move to the left, because a catalyst increases the forward rate of reactionEquilibrium will move to the right, because a catalyst increases the forward rate of reactionEquilibrium will not shift in position, because catalyst does not affect the position of equilibriumQuestion 11 of 15 Loading... 12. Explain the effects of increasing the temperature on the rate of a reaction in terms of particle collision theory1) particles have more kinetic energy 2) more frequent collisions 3) and a higher proportion of the collisions which occur have greater or equal to the activation energy 4) increase rate of reaction1) particles have less kinetic energy 2) less frequent collisions 3) and a lower proportion of the collisions which occur have greater or equal to the activitation energy 4) decrease rate of reaction1) particles have more kinetic energy 2) more frequent collisions 3) and a lower proportion of the collisions which occur have greater or equal to the activitation energy 4) increase rate of reaction1) particles have less kinetic energy 2) less frequent collisions 3) and a lower proportion of the collisions which occur have greater or equal to the activitation energy 4) increase rate of reactionQuestion 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 chloride + water NH₃ + HCl ⇌ NH₄Cl + H₂O ammonia + hydrogen chloride ⇌ ammonium chloride + hydrogen 2NH₃ + 2HCl ⇌ 2NH₃Cl + H₂ammonia + hydrogen chloride ⇌ ammonium hydrochloride NH₃ + HCl ⇌ NH₃ClHammonia + hydrogen chloride ⇌ ammonium chloride NH₃ + HCl ⇌ NH₄ClQuestion 13 of 15 Loading... 14. What is a catalyst?A 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 proceedsA 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 reactionQuestion 14 of 15 Loading... 15. What is meant by the term exothermic?A reaction which will only be spontaneous at cold temperatures (below 0⁰C)A reaction which will only be spontaneous at warm temperatures (above 100⁰C)A reaction in which heat energy is taken in (surroundings get colder)A reaction in which heat energy is given out (surroundings get hotter)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