Chemical Kinetics - Result Question 48

####49. The activation energy of a reaction can be determined from the slope of which of the following graphs?

[2015]

(a) ln⁡KT vs. T

(b) ln⁡K vs. lT

(c) Tln⁡Kvs⋅lT

(d) ln⁡K vs. T

Show Answer

Solution:

  1. (b) Arrhenius equation

K=A⋅e−Ea/RT⇒ln⁡K=ln⁡A−EaRT

slope =−EaR

so, activation energy of reaction can be determined from the slope of ln⁡Kvs1T

Arrhenius Equation

K=Ae−Ea/RT, where e−Ea/RT represents the fraction of molecules

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