Module #11: Chemical Kinetics

Question 1

What is the reaction rate equation that has units of M/sec?

Answer 1

R = Delta[product]/Delta t = - {Delta[reactants]/Delta t}

Question 2

What is the rate equation for a chemical reaction?

Answer 2

R = k x [A]^x x [B]^y

R is the rate of the equation, k is the rate constant, and x and y are exponents which do not necessarily relate to anything in the equation.

Question 3

First order reactions only, what is the equation for the half lives of reactions?

Answer 3

t1/2 = 0.693/k

Question 4

What is the equation for most second order equations?

Answer 4

1/[A] - 1/[A]o = k x t

Question 5

Elementary reaction

Answer 5

A reaction that contains only one step: a direct collision between all reactants in the reaction

Question 6

What is special about elementary reactions?

Answer 6

For elementary reactions only, the exponents in the rate equation are equal to the stoichiometric coefficients of the chemical reaction