Chemical kinetics data for the gas phase reactions of the first two electronically excited states of atomic nitrogen: N(2D) and N(2P), and of the first excited state of molecular nitrogen N2(A 3Σu+) are compiled and evaluated. The experimental data for 127 reactions are summarized, the experimental method and year of publication given, a recommended value given for the rate constant for each reaction at 298 K, and where possible, its temperature dependence. The reaction mechanisms are discussed within the limits of the available quantitative product yield data. The literature has been covered through early 1999. There are 94 references.

Acuchem is a program for solving the system of differential equations describing the temporal behavior of spatially homogeneous, isothermal, multicomponent chemical reaction systems. It is designed to provide modelers, data evaluators, and laboratory scientists with an easy to use program for modeling complex chemical reactions, and for presenting the results in tabular or graphical form. The program is described and some examples of its application given. Acuchem is designed to operate on the IBM Personal Computer family and other compatible microcomputers, and is available in a compiled version on a floppy disk.

This publication contains evaluated chemical kinetic data on a number of single step elementary reactions involving small polyatomic molecules which are of importance in propellant combustion. The work involves the collection and evaluation of mechanistic and rate information and the use of various methods for the extrapolation and estimation of rate data where information does not exist. The conditions covered range from 500-2500 K and 10 17 -10 22 particles/cm 3 • The results of the first years effort lead to coverage of all pertinent reactions of the following species; H, Hz, HzO, 0, OH, HCHO, CHO, CO, NO, NOz, HNO, HNOz, HeN, and NzO.

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