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twistedhyperboles

twistedhyperboles

18.08.2019 •

Chemistry

What type of solid is made up of crystals

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Ответ:

kellysimkin6196

30.12.2021

Granite is a type of solid that is made up of crystals

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Ответ:

lifeislove3251

27.03.2023

The activation energy for the gas phase isomerization of methyl cis-cinnamate is 173.519 kJ

Explanation:-

According to the Arrhenius equation,

$K=A\times e^{\frac{-Ea}{RT}}$

or,

$\log (\frac{K_2}{K_1})=\frac{Ea}{2.303\times R}[\frac{1}{T_1}-\frac{1}{T_2}]$

where,

K_1 = rate constant at 637K = $1.88\times 10^{-4}s^{-1}$

K_2 = rate constant at 679K = $1.43\times 10^{-3}s^{-1}$

= activation energy for the reaction = ?

R = gas constant = 8.314 J/mole.K

T_1 = initial temperature = 637K

T_2 = final temperature = 679K

Now put all the given values in this formula, we get

$\log (\frac{1.43\times 10^{-3}}{1.88\times 10^{-4}})=\frac{Ea}{2.303\times 8.314J/mole.K}[\frac{1}{637}-\frac{1}{679}]$

$0.88=\frac{Ea}{2.303\times 8.314J/mole.K}[\frac{1}{637}-\frac{1}{679}]$

Ea=173519J/mole=173.519kJ

Therefore, the activation energy for the reaction is, 173.519 kJ

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