Question

Please include all steps and significant digits and units. 2N2o5 (g) --> 4No2 (g) + O2...

Please include all steps and significant digits and units.

2N2o5 (g) --> 4No2 (g) + O2 (g)

The following data were obtained in a kinetic run from the decomposition of gaseous dinitrogen pentoxide at a set temperature.

Time (s)

0

100

200

300

400

500

600

700

[N2O5]    

0.0200

0.0169

0.0142

0.0120

0.0101

0.0086

0.0072

0.0061

a) Graphically determine the order of the reaction.

b) Calculate the rate constant for the reaction.

c) Calculate the concentration of dinitrogen pentoxide in the reaction vessel after 350 seconds.

Science   Chemistry   
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Answer #1

Just plot Time Vs the concentration of N2O5. If you are getting a straight line,it may be a first order reaction. Which depends on the concentration of only one reactant.

see the plot below

To assure again the order of reaction, consider the integrated rate equation for a first order reaction

So, that we need to plot a graph between ln[A] and time ,t in XY scatter form, then add trendline to get rate constant or -k value from the graph.

Here the equation on the graph is the equation for a straight line, from that the value of -k can be determined.

y= -0.001697x-3.91281

that is -k or rate constant =-0.001697

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