Question Video: Naming the Theory Describing How Chemical Reactions Occur after Particle Collisions | Nagwa Question Video: Naming the Theory Describing How Chemical Reactions Occur after Particle Collisions | Nagwa

Question Video: Naming the Theory Describing How Chemical Reactions Occur after Particle Collisions Chemistry • Third Year of Secondary School

What is the name of the theory that explains why chemical reactions can only take place when reacting particles collide with each other with sufficient energy?

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Video Transcript

What is the name of the theory that explains why chemical reactions can only take place when reacting particles collide with each other with sufficient energy?

The name of the theory described in this question is collision theory. There are three basic ideas in collision theory. The first idea is that reactions only happen when the reacting particles collide with each other. If the particles never touch, there won’t be any reaction. But not every collision causes a chemical reaction. After all, the nitrogen and oxygen gas particles in the air collide all the time but do not react. In order for a reaction to occur when particles collide, they must collide with sufficient energy. This energy is required to break bonds between the reactant particles and rearrange the particles to form the products.

But there is one more thing required for a chemical reaction. The particles must collide with the correct orientation. So according to collision theory, if particles collide with sufficient energy and in the right orientation, the chemical reaction will occur successfully. So collision theory is the name of the theory that describes why chemical reactions only take place when reacting particles collide with each other with sufficient energy.

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