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4.10: Rate Laws - Differential

  • Page ID
    35142
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    Discussion -

    Amount left: 30,   15,   7.5,   3.75
           Time: 8:00  8:45  10:15   13:15 
    t'increment:     45    90    180      (min)
    
    Calculate the time when 10 percent of the \(\ce{HI}\) has decomposed.
  • The dust explosion is a
    1. homogeneous reaction
    2. heterogeneous reaction
    3. catalytic reaction
    4. chain reaction

    Hint: b. heterogeneous reaction

    Discussion -
    Chain reactions may lead to explosion, but dust explosion is not a chain reaction. Chemists explained the causes of a grain elevator explosion.

  • For the reaction:

    \(\ce{2 NO + O2 \rightarrow 2 NO2}\),

    the following results were obtained:
      run      [NO]     [O2]     Rate
       1       0.12     0.05     0.12
       2       0.12     0.10     0.24
       3       0.24     0.05     0.48
    
    What is the order of the reaction with respect to \(\ce{[NO]}\)?

    Hint: 2

    Discussion -
    What is the order with respect to \(\ce{[O2]}\)?

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