NTA Abhyas JEE Main2020ChemistryChemical KineticsPractice
A reaction is carried out at 600 K . If the same reaction is carried out in the presence of catalyst at the same rate and same frequency factor, the temperature required is 500 K . What is the activation energy of the reaction, if the catalyst lowers the activation energy barrier by 20 kJ/mol?
Options
- A100 kJ/mol
- B120 kJ/mol
- C80
- DNone of these
Correct answer
B. 120 kJ/mol
Step-by-step solution
k = A e - E a / R × 600 k ′ = Ae − Ea − 20 R × 500 k = k ′ E a R × 600 = E a - 20 R × 500 E a 6 = E a - 20 5 5 6 E a = E a - 20 20 = E a - 5 6 E a E a = 20 × 6 E a = 120 k J / m o l