Why some chemical reactions happen in seconds while others take years
In short: Understanding chemistry requires looking at the microscopic chaos of particles. This video breaks down Collision Theory to explain why temperature, concentration, and catalysts dictate how fast matter transforms.
For a reaction to occur, particles must collide with enough energy to overcome a specific barrier called activation energy. The speed of a reaction depends on two variables: how often these collisions happen (frequency) and how much energy they carry.
The video explores four primary levers that manipulate these rates: temperature increases kinetic energy for more energetic hits; concentration and pressure pack more particles into a space to increase collision frequency; surface area exposes more reactant particles; and catalysts provide an alternative pathway with lower activation energy requirements.
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Sources
- Summary by Intellect · source: GCSE Chemistry - Factors Affecting Rate of Reaction & Collision Theory (2027/28 exams)
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