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Chemistry - Chemical Kinetics Question with Solution | TestHub

ChemistryChemical KineticsCollision TheoryMedium2 minQB

ChemistryMediumnumerical

Passage / Comprehension

Collision theory states that every reaction proceeds by the collision between the reactant molecules.

However, to bring about a chemical reaction, the reactants must collide with a certain minimum amount of energy and proper orientation. Such collisions which lead to the formation of products are called effective collisions. The rate constant of a reaction is written as $k = A e^{- E_{a} / RT}$ .

For the elementary reaction $A (g) ⟶ B (g)$ , the rate constant $k = Ae^{- Ea / RT}$ and the plot of $lo g k$ vs $1/ T$ is given as :

Find the activation energy (in kcal/mol).

Answer:

2.76

Solution:

$lo g k = lo g A - \frac{Ea}{2.303 RT}$

$tan θ = \frac{Ea}{2.303 RT} = \frac{600}{T}$

$Ea = 2.303 \times 2 \times 600 = 2763.6 cal / mole = 2.76 kcal / mole$

Stream:JEESubject:ChemistryTopic:Chemical KineticsSubtopic:Collision Theory

⏱ 2mℹ️ Source: QB

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