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  • Activation energy of a chemical reaction can be determined by _____________. (i) determining the rate constant at standard temperature. (ii) determining the rate constants at two temperatures.

Activation energy of a chemical reaction can be determined by _____________.

(i) determining the rate constant at standard temperature.

(ii) determining the rate constants at two temperatures.

(iii) determining the probability of collision.

(iv) using catalyst.

Answers (1)

The answer is the option (ii). According to Arrhenius equation, activation energy can be calculated by measuring the rate constants at two different temperatures.

log\left ( \frac{k_{2}}{k_{1}} \right )=\frac{E_{a}}{2.303R}(\frac{1}{T_{1}}-\frac{1}{T_{2}})

Where, E_{a}=\text {Activation energy}

T_{1}=\text {lower temperature}

T_{2}=\text {Higher temperature}

k_{1}=\text {rate constant at temperature }T_{1}

k_{2}=\text {rate constant at temperature }T_{2}

Posted by

infoexpert23

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