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With increase of 10K temperature, rate of reaction doubles. This increase in rate of reaction is due to:

Correct answer: C. Increase in number of effective collisions

  • A. Decrease in Ea of reaction
  • B. Increase in Ea of reactants
  • C. Increase in number of effective collisions
  • D. Decrease in number of effective collisions

Explanation

When the temperature of a reaction increases, the kinetic energy of the molecules also increases. This leads to an increase in the number of effective collisions between reactant molecules. As a result, the rate of the reaction increases. According to the collision theory, for a reaction to occur, molecules must collide with sufficient energy (activation energy, Ea) and proper orientation. The increase in temperature provides more molecules with the energy needed to overcome the activation energy barrier, thereby increasing the likelihood of successful collisions and leading to a higher reaction rate.

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About Reaction Kinetics

Reaction kinetics relates reaction rate to concentration, temperature, surface area and catalysts. Questions cover rate laws, reaction order, rate constants, activation energy and the activated complex, including how a catalyst lowers the activation energy without changing the overall energy change or equilibrium position.

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