The gas phase decomposition of dinitrogen pentoxide was studied at 294 Kand 1 bar. N,Os > NO: + NO, and its concentration was monitored using IR spectroscopy. The following results were obtained 10 20 19.5 30 40 50 IN:O1/10* mol dm' Show that the reaction is first order and find a value for the rate constant at 294 K. 34.0 27.0 15.0 11.5 8.7

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