Question

] Using the Arrhenius equation, determine the following effects on the rate of a reaction. Which...

] Using the Arrhenius equation, determine the following effects on the rate of a reaction. Which increase the rate, and which decrease the rate? (1) Increasing the temperature of the reaction (2) Increasing the activation energy of a reaction (3) Decreasing the temperature of the reaction (4) Adding a catalyst to the reaction

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Answer #1

Arrhenius equation is:

K = A*e^(-Ea/RT)

K is rate constant of reaction

1)

Increasing temperature will decrease Ea/RT which in turn will increase the value of K

Hence rate of reaction will increase

2)

increasing Ea will increase Ea/RT which in turn will decrease the value of K

Hence rate of reaction will decrease

3)

Decreasing temperature will increase Ea/RT which in turn will decrease the value of K

Hence rate of reaction will decrease

4)

Adding catalyst will decrease Ea.

decreasing Ea will decrease Ea/RT which in turn will increase the value of K

Hence rate of reaction will increase

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