1. See if you can reproduce each of the scenarios from the pre-lab. What did you have to do to make each unsuccessful collision happen? What did you have to do to make an effective collision happen?
To create an unsuccessful reaction, we used the Angled Shooter to shoot away from the second reactant. This caused Reactant A to completely miss Reactant B, causing an unsuccessful reaction. To create an effective collision, we used the straight shooter, shooting Reactant A directly into Reactant B with the most force possible.
2. Use the “design your own reaction” tab to change the energy levels of the “before” and “after” molecules. You can create a huge potential energy hump to represent a particularly difficult reaction. Where do you need to move the “total energy” to create an effective collision?
The total energy can be anywhere, as long as you shoot the first reactant hard enough to cause an effective reaction.
3. What is the effect of raising or lowering the temperature? The effect of raising the temperature will become clearer as you make the “potential energy hump” bigger. The effect of lowering the temperature will become clear if you choose the fourth reaction from the list on the right.
When the temperature is lowered (colder), the reactants move slower.
When the temperature is raised (warmer), the reactants move faster.
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