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NTA Abhyas NEET2020ChemistryChemical KineticsPractice

What is the activation energy for a reaction if its rate doubles when temperature is raised from 20°C to 35°C? ( R = 8.314 J m o l - 1 K - 1 )

Options

  1. A269 k J m o l - 1
  2. B34.7 k J m o l - 1
  3. C15.1 k J m o l - 1
  4. D342 k J m o l - 1

Correct answer

B. 34.7 k J m o l - 1

Step-by-step solution

Using Arrhenius equation l o g 10 k 2 k 1 = E a 2.303 R 1 T 1 - 1 T 2 l o g 10 2 = E a 2.303 × 8.314 × 1 293 - 1 308 On solving E a = 34.67 kJ

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