Question

the rate constant for the reaction shown below is 2.6x10^-8 L/mol*s when the reaction proceeds at 300K. The Activation Energy is 98000J/mol. Determine the magnitude of the frequency factor for the reaction. If the temperature changed to 310K, there rate constant would change. The ration of K at 310 K is closest to what whole number?

Answer #1

As we know rhat

k= A e^{-Ea/RT} where k= rate constant , A
= frequency factor , Ea =Activation Energy , R = gas
constant , T =temperature at which reaction proceed

2.6x10^{-8} L/mol * s = A e^{-98000/ 8.314 *
300}

A = 2.6x10^{-8 /} e^{98000/
2494.2}

= 2.6x10^{-8 /} e^{-39.29} = 2.6 *
10^{-8} / 8.64 10^{-18}

= 0.3009 * 10^{10} L/mol * s

2) k2 = A e^{-Ea/RT}

= 0.3009 * 10^{10} * e^{-98000/ 8.314 *
310}

= 0.3009 * 10^{10} * e^{-98000/ 2577.34}

= 0.3009 * 10^{10} * e^{-38.023}

= 0.3009 * 10^{10*} 3.067 *
10^{-17}

= 0.922 * 10^{-7} L/mol s

tempearture coefficient = k_{t+10} /k_{t} =
0.922 * 10^{-7} / 2.6 * 10^{-8} = .0.35 = 3.5 =
()

The ration of K at 310 K is closest to 3 whole number .

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The following data show the rate constant of a reaction measured
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Rate Constant (1/s)
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There are several factors that affect the rate of a reaction.
These factors include temperature, activation energy, steric
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__________________________________________________
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