Tests were run on a small experimental reactor used for decomposing nitrogen oxides in an...

Tests were run on a small experimental reactor used for decomposing nitrogen oxides in an automobile exhaust stream. In one series of tests, a nitrogen stream containing various concentrations of NO2 was fed to a reactor, and the kinetic data obtained are shown in Figure. Each point represents one complete run. The reactor operates essentially as an isothermal backmix reactor (CSTR). What can you deduce about the apparent order of the reaction over the temperature range studied?

Figure P7-11A Auto exhaust data.

The plot gives the fractional decomposition of NO2 fed versus the ratio of reactor volume V (in cm3 ) to the NO2 feed rate, , at different feed concentrations of NO (in parts per million by weight).