N2O5 NITROGEN PENTOXIDE

Rate constants for the first-order decomposition of nitrogen pentoxide (N2O5) at various temperatures are as follows (Alberty and Silbey, 1992, p. 635) ... 

The time in which a given molecule remained in the tube was estimated by dividing the volume of the tube by the rate of gas flow as determined with a flowmeter. The ratio of nitrites to total acidity gave the ratio N()2/(N2O5+NO2) and hence a measure of the percentage decomposition. The specific decomposition rate k was then calculated for various temperatures and for different pressures. Within the limit of experimental accuracy the specific decomposition rate of nitrogen pentoxide was the same as that determined by the static method, already described, and furthermore, this same constant was maintained down to a few millimeters and even to tenths of millimeters. 

For example, when stilbene, C 5CH CH.C6H5, is treated with nitrogen pentoxide, N2O5, the resulting compd is C6H5.CH(N02).CH(N02).C6Hs, named 1,2-dinitto-1,2-diphenyl-ethane. The group, -CH(N02)-CH(N02)-, is a "dinitrure ... 

Write a conversion factor that converts between moles of nitrogen in nitrogen pentoxide, N2O5, and moles of N2O5. 

Draw a Lewis stmcture for nitrogen pentoxide (N2O5) in which each N is bonded to three O atoms. 

A great many reactions follow first-order kinetics or pseudo first-order kinetics over certain ranges of experimental conditions. Among these are many pyrolysis reactions, the cracking of butane, the decomposition of nitrogen pentoxide (N2O5), and radioactive decay processes. 

Nitrogen forms three common oxides N2O (nitrous oxide), NO (nitric oxide), and NO2 (nitrogen dioxide). It also forms two unstable oxides that we will not discuss, N2O3 (dinitrogen trioxide) and N2O5 (dinitrogen pentoxide). 

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