Q. The slope of Arrhenius Plot (ln K v/s 1/T) of first order reaction is $-5 \times 10^3$ K. The value of $E_a$ of the reaction is. Choose the correct option for your answer. [Given R = 8.314 $JK^{-1}$ $mol^{-1}$]
A) 83.0 kJ $mol^{-1}$
B) 166 kJ $mol^{-1}$
C) -83 kJ $mol^{-1}$
D) 41.5 kJ $mol^{-1}$
Explanation
[Solution] Slope $= -E_a/R$, so $E_a = 5 \times 10^3 \times 8.314 = 41.57$ kJ $mol^{-1} \approx 41.5$ kJ $mol^{-1}$. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.