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(C) The rate constant $k$ is related to the activation energy $E_a$ by the Arrhenius equation,$k = A e^{-E_a/RT}$.To increase the rate constant $k$,th

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decreasing,increasing

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(C) The rate constant $k$ is related to the activation energy $E_a$ by the Arrhenius equation,$k = A e^{-E_a/RT}$.To increase the rate constant $k$,the activation energy $E_a$ must be decreased.$E_a = E_{	ext{transition state}} - E_{	ext{reactant}}$.Decreasing the stability of the reactant increases its energy,which decreases $E_a$.Increasing the stability of the transition state decreases its energy,which also decreases $E_a$.Therefore,the rate constant increases by decreasing the stability of the reactant or by increasing the stability of the transition state.

The rate constant for a reaction can be increased by $\underline{a}$ the stability of the reactant or by $\underline{b}$ the stability of the transition state. Select the correct choice for $a$ and $b$.

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