8. The chemical reaction proceeds under the conditions indicated in the table. Using the collision theory, determine the kinetic characteristic of the reaction that is absent in the corresponding variant.

No. of Option Reaction T, K Rate constant Activation energy E, kJ/mol Steric factor p Diameter of reacting particles σav, cm Answer
8 CH3NNCH3 → C2H6 N2 P = 487 mmHg 603 2.96 ∙10-3 min-1 219.199? 3.98 ∙ 10-8 p = 14.2 ∙ 106

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