rates

Question 1

State the effect of the higher temperature on the rate constant, k.

Answer 1

increases

Question 2

Explain why this mechanism is consistent with the rate equation rate = k[H2(g)][NO(g)]2

Answer 2

Steps 1 AND Step 2 together give

Question 3

A proposed mechanism for this reaction takes place in several steps.Suggest two reasons why it is unlikely that this reaction could take place in one step.

Answer 3

(stoichiometry in) rate equation does not match
(stoichiometry) in overall equation 
Collision unlikely with more than 2 ions/species/particles 

Question 4

What is meant by the half-life of a reaction?

Answer 4

Time for concentration (of reactant) to fall to half original value

Question 5

The order of this reaction with respect to H2O is effectively zero.Explain why.

Answer 5

water is in excess
OR
concentration of H2O is very large/does not change