Question

(A). Write definition of order of reaction. (B). According to collision theory, write two main barriers for any chemical reaction.
(C). Show that, In a first order reaction, time required for completion of 99.9% is 10 times of half-life, (log 10 = 1)

Answer 1

1-

The order of a chemical reaction is defined as the sum of the powers of the concentration of the reactants in the rate equation of that particular chemical reaction.

2-(a) When pressure decreases, the speed of formation of $$HCl$$ decreases. (b) When the particle size of $$Ca{CO}_{3}$$ decreases speed of chemical reaction increases. (c) All collisions between reactant molecules are not leading to a chemical reaction.

3- Chemical Kinetics

Show that in first order reaction time required for completion of 99.9% is 10 times of half-life (t1/2) of the reaction. The dimensions of rate constant, k are L mol–1 s–1. The dimensions of rate constant, k are L1/2 mol–1/2 s–1.