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The Collision Theory

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kristine alaban

The document discusses collision theory and factors that affect chemical reaction rates, stating that reaction rates increase with higher temperatures, larger surface areas, higher concentrations of reactants, and the presence of catalysts as these factors all lead to more frequent collisions between reactant molecules that have sufficient kinetic energy to reach the transition state.

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The Collision Theory
The collision theory states that gas-phase chemical reaction occurs when molecules colliding have sufficient kinetic energy.
What is activation energy? Activation energy is the energy required to proceed and reach the transition state.
Reaction rate Reaction rate is intuitively defines as how quickly or slowly a reaction takes place.
Factors affecting reaction rate ï‚—Temperature ï‚—Surface area ï‚—Concentration of reactants ï‚—Catalyst
Temperature If the temperature is increased: * the reactant particles move more quickly * the reactant particles have more kinetic energy * the reaction rate increases
The Collision Theory
Surface area Larger surface area would have a larger space of collision between particles of a reaction.
The Collision Theory
Concentration of reactants If the concentration is increased: * the reactant particles become more crowded * there is a greater chance of the particles colliding; * the rate of reaction increases
The Collision Theory
Catalyst Catalyst is a substance that makes a chemical reaction faster.
The Collision Theory

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The Collision Theory