Why can an increase in temperature lead to more effective collisions between reactant particles and an increase in the rate of a chemical reaction?the activation energy of the reaction increases.the activation energy of the reaction decreases.the number of molecules with sufficient energy to react increases.the number of molecules with sufficient energy to react decreases?

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21-06-2018
Chemistry

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Why can an increase in temperature lead to more effective collisions between reactant particles and an increase in the rate of a chemical reaction?the activation energy of the reaction increases.the activation energy of the reaction decreases.the number of molecules with sufficient energy to react increases.the number of molecules with sufficient energy to react decreases?

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tаskmasters tаskmasters · Answer 1 · 2018-06-21T08:32:11+02:00

The answer to this question is that the number of molecules with sufficient energy to react increases. The lack of reactivity at room temperature is not due to lack of collision. Since high temperatures favor fast rate of reactions, energy in a given molecule determines whether the molecule will react.
At some temperature, some molecules react and some molecules do not react. There must be a continuous distribution of energy between the molecules.
As the system temperature rises, the average energy in the system also increases. The increase in reaction rate due to temperature increase is mainly due to an increase in the number of molecules with sufficient energy to react, not an increase in the number of collisions.