Introduction to Collision Theory

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What is Collision Theory?

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Collision Theory explains how chemical reactions occur and why reaction rates differ for different reactions. It states that for a reaction to occur, reactant particles must collide with sufficient energy and proper orientation.

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What is a Chemical Change?

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A chemical change is a process where one or more substances are transformed into new substances with different properties, such as rusting of iron or burning wood.

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What is a Physical Change?

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A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition, such as melting ice or dissolving sugar in water.

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Define the Law of Conservation of Mass.

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The law of conservation of mass states that mass is conserved in a closed system; it cannot be created or destroyed in a chemical reaction.

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What is required for a chemical reaction to occur according to Collision Theory?

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Reactant particles must collide and interact with sufficient energy and proper orientation.

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What happens during a chemical reaction?

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Reactants are converted into products through bond breaking and forming.

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What is the difference between a physical change and a chemical change?

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A chemical change results in the formation of new substances, while a physical change does not alter the chemical composition of the substance.

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What is Activation Energy?

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Activation energy is the minimum amount of energy required for reactants to collide and undergo a chemical reaction.

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What role does temperature play in chemical reactions?

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Increasing temperature generally increases the kinetic energy of particles, leading to more frequent and effective collisions, thus increasing the reaction rate.

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What is a Reactant?

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A reactant is a substance that undergoes a chemical change in a reaction, combining with other reactants to form products.