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- 1. Multiple Choice
What letter represents the activation energy?ABCD - 2. Multiple ChoiceWhich letter corresponds to the activation energy of the forward reaction?ABCD
- 3. Multiple ChoiceIncrease in temperature of the reactants can do one of the followingSlow collision frequencyAllow less effective collision between the particlesCause particles to lose speedIncrease collision between the particles thus increasing the rate.
- 4. Multiple ChoiceWhat does NOT happen when the temperature is increased?Particles collide more oftenParticles collide with more energyParticles move fasterMore particles collide in the correct orientation
- 5. Multiple ChoiceWhich factors increase the rate of a reaction.increasing temperatureincreasing concentrationincreasing surface areaall of these
- 6. Multiple ChoiceWhich letter corresponds to the energy of the activated complex?ACDE
- 7. Multiple Choice
Arrhenius equation is
k = AeEa/RT
k = Ae-Ea/RT
k = AeRT/Ea
k = Ae-RT/Ea
- 8. Multiple Choice
A catalyst increases the rate of a chemical reaction by
increasing the activation energy
decreasing the activation energy
reacting with reactants
reacting with products
- 9. Multiple Choice
What is collision theory?
Molecules must collide in the correct orientation with enough energy to bond.
Molecules need enough energy to collide and react.
Atoms constantly collide and react.
The minimum energy needed for atoms to react
- 10. Multiple Choice
What factors effect rate of reaction?
Temperature, Concentration, Pressure and Energy
Surface Area, Concentration, Energy and Pressure
Temperature, Pressure, Concentration and Surface area
Pressure, Surface area, Density and Energy
- 11. Multiple Choice
Decreasing the concentration of a substance will usually........
Slow down the reaction
Speed up the reaction
Have no affect on the reaction
- 12. Multiple Choice
If you shrink the container size that your gas substance is in what will happen?
The reaction rate will stay the same
The reaction rate will speed up
The reaction rate will slow down
- 13. Multiple ChoiceWith the increase in temperature, the average kinetic energy of the molecules increases, leading to a decrease in number of collisions per unit time.TrueFalse
- 14. Multiple ChoiceMore collisions correspond to a:Faster reaction rateSlower reaction rateConstant reaction rateNone of the above
- 15. Multiple Choice
When surface area is decreased the rate of reaction...
Decreases, because there are LESS possible sites for correct collisions
Increases, because there are LESS possible sites for correct collisions
Decreases, because there are MORE possible sites for correct collisions
Increases, because there are MORE possible sites for correct collisions
- 16. Multiple Choice
Consider the following energy profile diagram for a reaction represented by the equation X+Y→Z
Which one of the following provides the correct values of the activation energy (in kJ mol-1) and the ΔH (in kJ mol-1) for the reaction
Activation Energy = +75; ΔH = +100
Activation Energy = +100; ΔH = +175
Activation Energy = +175; ΔH = +100
Activation Energy = +200; ΔH = -125
- 17. Multiple Choice
An energy profile for a reversible chemical reaction is shown. According to this profile, the activation energy of the reverse reaction is equal to
D
C - B
A - B
C- D
- 18. Multiple Choice
Which letter represents the transition state?
A
B
C
D
E
- 19. Multiple Choice
Increasing the temperature in a reaction lowers the activation energy.
True
False
- 20. Multiple Choice
For which reaction is the activation energy higher?
With the catalyst
Without the catalyst
- Answer choicesTagsAnswer choicesTags