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The rate constant of a reaction depends on
  • Temperature
  • Mass
  • Weight
  • Time


A.

Temperature
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The rate of a chemical reaction
  • Increases as the reaction proceeds
  • Decreases as the reaction proceeds
  • May increase or decrease during the reaction
  • Remains constant as the reaction proceeds

B.

Decreases as the reaction proceeds
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A zero order reaction is one
  • Whose rate is affected by concentration.
  • In which concentration of the reactants does not change with time.
  • In which reactants do not react.
  • In which one of the reactants is in large excess.

B.

In which concentration of the reactants does not change with time.
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For the reaction mechanism:
H2 + 2NO → N2 + H2O2 (slow)
H2O2 + H2 2H2O (fast)
the rate law is rate
  • k[H2] [NO]2
  • k[H2O2]2
  • k[N2][H2O2]2
  • k[H2O2] [H2]

A.

k[H2] [NO]2
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For a chemical reaction, R → P, it is found that the rate of a reaction doubles, when the concentration of R is increased two times. The order of the reaction is
  • half
  • half
  • one
  • two

C.

one
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