Chemistry - Chemical Kinetics Question with Solution | TestHub

ChemistryChemical KineticsZero Order ReactionsMedium2 minPYQ_2021

ChemistryMediumnumerical

If the activation energy of a reaction is $80.9 kJ {mol}^{- 1}$ , the fraction of molecules at $700 K$ , having enough energy to react to form products is $e^{- x}$ . The value of $x$ is (Rounded off to the nearest integer) [Use $R = 8.31 J K^{- 1} {mol}^{- 1}$ ]

Answer:

14.00

Solution:

Fraction of molecules to have enough energy to react $= e^{- Ea / RT}$

So, $x = \frac{E_{a}}{RT}$

$= \frac{80.9 \times 10^{3}}{8.31 \times 700}$

$= 13.9 \approx 14$

Stream:JEESubject:ChemistryTopic:Chemical KineticsSubtopic:Zero Order Reactions

⏱ 2mℹ️ Source: PYQ_2021

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