Activation Energy Worksheet
Explore the concept of activation energy, its role in chemical reactions, and how catalysts affect reaction rates at a Grade 12 level.
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Activation Energy Worksheet
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Read each question carefully and provide detailed answers based on your understanding of activation energy and chemical kinetics.
1. What is the primary role of a catalyst in a chemical reaction?
Increase the enthalpy change of the reaction
Decrease the activation energy
Shift the equilibrium position
Increase the kinetic energy of reactants
2. Which of the following statements about activation energy is TRUE?
It is the energy released during a reaction.
It is the minimum energy required for a reaction to occur.
It is always negative for exothermic reactions.
It is independent of temperature.
1. The activated complex, or transition state, is a high-energy, unstable intermediate formed during the of a chemical reaction.
2. Increasing the temperature generally the rate of a chemical reaction because more molecules possess the necessary activation energy.
3. In an energy profile diagram, the activation energy is represented by the difference in energy between the reactants and the .
1. Explain how a catalyst affects the rate of a chemical reaction without being consumed in the process. Refer to activation energy in your explanation.
2. Draw a simple reaction energy profile diagram for an exothermic reaction, clearly labeling the reactants, products, transition state, activation energy (Ea), and enthalpy change (ΔH).
1. A reaction with a high activation energy will always proceed quickly.
True
False
2. Increasing the concentration of reactants will increase the activation energy.
True
False
1. Discuss the collision theory and how it relates to activation energy. In your answer, explain the conditions necessary for an effective collision to occur and how these conditions are influenced by factors like temperature and concentration.