Problem: The gas-phase decomposition of NO2, NO2 (g) → 2 NO (g) + O2 (g), is studied at 383 oC, giving the following data:Time (s)[NO2] (M)0.00.1005.00.01710.00.009015.00.006220.00.0047If you used the method of initial rates to obtain the order for NO2, predict what reaction rates you would measure in the beginning of the reaction for initial concentrations of 0.200 M, 0.100 M, and 0.050 M NO2.

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We need to plot the points according to the equations above and identify which is linear. 

  • Since plotting on a graph can be a bit unreliable when using only pen and paper we will use the stat function of the calculator. 
  • We can't really see the graph but we have to calculate for R2 
  • An R2 that is very close to 1 (about 0.99) should mean that the plot is linear. 


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Problem Details
The gas-phase decomposition of NO2, NO2 (g) → 2 NO (g) + O2 (g), is studied at 383 oC, giving the following data:


Time (s)[NO2] (M)
0.00.100
5.00.017
10.00.0090
15.00.0062
20.00.0047


If you used the method of initial rates to obtain the order for NO2, predict what reaction rates you would measure in the beginning of the reaction for initial concentrations of 0.200 M, 0.100 M, and 0.050 M NO2.

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