UTF-8Exothermic and Endothermic ReactionsQuestions this activity addresses:
What is the Source of energy in Exothermic Reactions?
What provides energy for Endothermic Reactions?
Initial Simulation: The container has two types of molecule, A2 and B2.
These molecules can react according to this Reaction: A2 + B2 = 2AB
Start the simulation to see whether the reaction occurs with the initial conditions.
Challenge 1: Make the reaction occur by changing the temperature.
First run the simulation at the starting temperature. Does the reaction occur? How do you know?
Next see if you can make the reaction occur by changing the temperature. Do you have to raise or lower the temperature?
Describe what you did and what you see in the simulation in your research notes. Explain how you know the reaction occurred.
Challenge 2: Make the reaction occur without changing the temperature, by changing the activation energy.
Reset the simulation to the starting condition. Access the Reaction Parameters under the Reaction menu and make changes to "fix" the simulation so that the desired reaction actually occurs by changing the activation energy. Describe in your research notes what you did and what the results were. How do you know the reaction occured? Is the reaction endothermic or exothermic? How do you know?
Challenge 3: Make the reaction a 50%-50% equilibrium.
Without resetting the simulation to the starting condition, make changes to the Reaction Parameters so the reaction produces a 50%-50% equilibrium between products and reactants. Describe in your research notes the changes you made
to achieve the goal. How do you know you were successful?
Challenge 4: Make the reaction favor starting materials instead of products. Without resetting the simulation, change the Reaction Parameters so the reaction favors the reactants A2 or B2 instead of the products. Describe in your research notes the changes you made to achieve the goal. How do you know you were successful.
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