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Science Clinic => Chemistry => Topic started by: jasdeep_brar on Jul 8, 2021

Title: The first-order reaction, 2 N2O(g) 2 N2(g) + O2(g), has a rate constant equal to 0.76 s-1 at 1000 ...
Post by: jasdeep_brar on Jul 8, 2021

Question 1

The first-order reaction A → Products has a half-life, t_1/2, of 55.0 min at 25 °C and 6.8 min at 100 °C. What is the activation energy for this reaction?
◦ -25.8 kJ/mol
◦ -38.8 kJ/mol
◦ 347 kJ/mol
◦ 25.8 kJ/mol
◦ 38.8 kJ/mol

Question 2

The first-order reaction, 2 N₂O(g) → 2 N₂(g) + O₂(g), has a rate constant equal to 0.76 s^-1 at 1000 K. How long will it take for the concentration of N₂O to decrease to 12% of its initial concentration?
◦ 0.62 s
◦ 2.8 s
◦ 6.3 s
◦ 8.4 s

Title: The first-order reaction, 2 N2O(g) 2 N2(g) + O2(g), has a rate constant equal to 0.76 s-1 at 1000 ...
Post by: Anton on Jul 8, 2021

Answer 1

25.8 kJ/mol

Answer 2

2.8 s