The reaction between carbon disulfide and ozone described by the equation Pos (t

Question

The reaction between carbon disulfide and ozone described by the equation Pos (torr) time (s) cs,(g) + 203(g) 1.97 1.16 0.881 0.580 0.413 CO2(g)+2SO2(g) 30 60 120 180 240 was studied using a large excess of CS2(g). The pressure of ozone as a function of time is given in the table to the right. 0.324 The graph on the right is derived from What is the order of this reaction with respect to ozone? the data in the table. Label the axes of the graph correctly such that the slope of the line is equal to the rate constant O Zero O First O Second Po, In(Po.) 1/(Po) time

Explanation / Answer

For a second order reaction, as shown in the above figure, the plot of 1/conceentration versus time is a straight line with k = slope of the line. Hence, the order of reaction is 2

PO2 (Torr) Time (s) 1/PO2 1.97 0 0.5076 1.16 30 0.8621 0.881 60 1.1351 0.58 120 1.7241 0.413 180 2.4213 0.324 240 3.0864

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