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- 1. Multiple Choice
What type of reaction is this?EndothermicExothermic - 2. Multiple ChoiceWhat letter represents the activation energy?ABCD
- 3. Multiple ChoiceIs this reaction endothermic or exothermic?endothermicexothermic
- 4. Multiple ChoiceWhat is the activation energy of the reverse reaction?75 kJ300 kJ150 kJ225 kJ
- 5. Multiple ChoiceWhat is the energy of the activated complex?75 kJ225 kJ300 kJ225 kJ
- 6. Multiple ChoiceHow much potential energy do the products of the reverse reaction have?225 kJ300 kJ75 kJ250 kJ
- 7. Multiple ChoiceWhat letter represents the energy of the products?ABCD
- 8. Multiple ChoiceWhat is the ΔH of this reaction?40 kJ20 kJ80 kJ60 kJ
- 9. Multiple ChoiceWhat letter represents ΔH?ABCD
- 10. Multiple ChoiceWhat is the sign of ΔH for all endothermic reactions?PositiveNegative
- 11. Multiple ChoiceIs photosynthesis an endothermic or exothermic process.Endothermic; light energy is absorbed.Endothermic; light energy is released.Exothermic; light energy is absorbed.Exothermic; light energy is released.
- 12. Multiple ChoiceA substance that starts a reaction between substances without being affected by the reactionelectrolystecatalystmarinateenzymatic browning
- 13. Multiple ChoiceThe energy needed to start a reactionactivation energynomenclatureoxidasecatalyst
- 14. Multiple ChoiceWhich interval represents the heat of reaction for the reaction?ABDE
- 15. Multiple ChoiceInterval C in this potential energy diagram could be changed by adding a ________?CookiesMore energyCatalystChanging the temperature
- 16. Multiple ChoiceWhich numbered interval on the diagram would change when a catalyst is added?B & CC & DE & CA & D
- 17. Multiple ChoiceWhich term refers to the difference between thepotential energy of the products and the potential energy ofthe reactants for any chemical change?heat of depositionheat of fusionheat of reactionheat of vaporization
- 18. Multiple ChoiceWhich is a factor that would not affect the rate of a reaction?TemperatureAdding a catalystConcentrationThe weather
- 19. Multiple ChoiceWhich picture shows how a catalyst would change the rate?Option 3Option 2Option 1
- 20. Multiple ChoiceThe SI unit of heat and energy is the __________.calorieheatjoulewatt
- 21. Multiple ChoiceΔH value in an endothermic reaction is a positive number.TrueFalse
- 22. Multiple ChoiceChemists believe that chemical reactions occur because the molecules involved in the reactionare always unstable.exist only below a certain maximum temperature.collide with each other with enough energy to break chemical bonds and arrange to form new products.are moving so fast that the chance of interaction is very small.
- 23. Multiple ChoiceHow does the presence of a catalyst increase reaction rate?A catalyst increases the activation energy.A catalyst decreases the activation energy.
- 24. Multiple ChoiceCollision theory predicts all of the following EXCEPT that:a reaction will occur only if the collision geometry is correcta reaction will not occur if the collision occurs with energy that is less than the activation energya reaction will occur if the reactants DO NOT collidefrequency of collisions will increase with increasing temperature
- 25. Multiple ChoiceWhich of the following will have the fastest reaction rate?methane gas because gases are more reactive than solids and liquidssalt because solids are more reactive than liquids or gaseswater because liquids are more reactive than solids and gasesall of these will react at the same rate
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