Orders, Rates Equations & Rate Constants

Question 1

What are the units of rate?

Answer 1

Mol dm-3 s-1

Question 2

Describe how zero order affects the rate of reaction.

Answer 2

• concentration has no effect on the rate (x1)

Question 3

Describe how first order affects the rate of reaction.

Answer 3

• any change in concentration gives the same change in rate of reaction
  e.g. [x2] = rate x2

Question 4

Describe how second order affects rate of reaction.

Answer 4

• any change in concentration changes the rate by the square of the change
  e.g. [x2] = rate (x(2)(2)) —> x4

Question 5

What is the rate equation?

Answer 5

Rate = k[A]^m[B]^n

Question 6

What is the overall order of a reaction?

Answer 6

Sum of all the orders in the rate equation
e.g. m+n