Question detail
Describe the role of activation energy in determining whether a collision between particles results in a reaction.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Kinetics
Question
Describe the role of activation energy in determining whether a collision between particles results in a reaction.
Answer
Activation energy is the minimum energy required for a collision to result in a reaction. If the colliding particles possess energy equal to or greater than the activation energy, they can successfully break bonds and form new products. Conversely, if their energy is lower, the collision will not lead to a reaction, which affects the overall reaction rate.
Explanation
This answer effectively outlines the role of activation energy by linking it to the energy of colliding particles and the outcome of the collision. It tests the student's ability to connect the concept of activation energy with reaction outcomes.
Common mistake
Collisions Not Leading to Reaction
Students often state that most collisions do not lead to a reaction without explaining why.
To correct this, students should explain that the cause is insufficient energy in most collisions. The mechanism is that only collisions with energy equal to or greater than the activation energy can overcome the energy barrier for reaction. The effect is that these collisions do not result in a reaction, leading to the consequence that reaction rates remain low.
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