Energy Level Diagrams Quiz
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5 questions, one answer each
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1. On an energy level diagram, what does a lower product line than reactant line show?
- A. Endothermic
- B. Exothermic
- C. Catalysed
- D. Reversible
2. What is activation energy?
- A. The total energy released in a reaction
- B. The minimum energy particles need to react
- C. The energy of the products
- D. The mass lost in a reaction
3. A catalyst is added to a reaction. What happens to the energy level diagram?
- A. The reactant energy increases
- B. The activation energy hump becomes lower
- C. The product energy decreases
- D. ΔH becomes more negative
4. An energy level diagram shows the product line above the reactant line, with ΔH = +45 kJ/mol. What type of reaction is this?
- A. Exothermic
- B. Neutralisation
- C. Endothermic
- D. Catalytic
5. Two reactions have identical reactant and product energy levels but reaction X has a smaller activation energy hump than reaction Y. What is the best explanation?
- A. Reaction X is more exothermic than Y
- B. Reaction X has a catalyst present or an easier reaction pathway than Y
- C. Reaction Y releases more energy overall
- D. Reaction X is endothermic and Y is exothermic