Volume 21, Issue 4, July 1992
Index of content:
21(1992); http://dx.doi.org/10.1063/1.555914View Description Hide Description
This paper contains evaluated chemical kinetic data on single step elementary reactions involving small polyatomic molecules which are of importance in propellant combustion. The work consists of 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 101 7‐102 2 particles cm− 3. The results of the second year’s effort add to the existing data base reactions involving CN, NCO, and HNCO with each other and the following species: H, H2, H2O, O, OH, HCHO, CHO, CO, NO, NO2, HNO, HNO2, HCN, and N2O.
Thermodynamic Properties of the NaCl+H2O System. II. Thermodynamic Properties of NaCl(aq), NaCl⋅2H2(cr), and Phase Equilibria21(1992); http://dx.doi.org/10.1063/1.555915View Description Hide Description
Equations that described the thermodynamic properties of the NaCl+H2O system were obtained from a fit to experimental results for this system. The experimental results included in the fit spanned the range of temperature of approximately 250 to 600 K and, where available, the range of pressure from the vapor pressure of the solution to 100 MPa. New equations and/or values for the following properties are given in the present work: 1) Δ f G 0 m and Δ f H 0 m , for formation from the elements, for NaCl(cr) for 298.15 K and 0.1 MPa, 2) Δ f G 0 m and Δ f H 0 m from the elements, as well as S 0 m and C 0 p,m , all for 298.15 K, 0.1MPa, for NaCl⋅2H2O(cr), 3) the change in chemical potential for both NaCl and H2O in NaCl(aq) as a function of temperature, pressure, and molality, valid from 250 to 600 K and, where available, from the vapor pressure of the solution to 100 MPa. Comparison of the accuracies of experimental methods, where possible, has also been performed.
21(1992); http://dx.doi.org/10.1063/1.555916View Description Hide Description
A compilation of experimental data is presented which covers all known molecular species fitting the 1H x 1 4N y 1 6O z ( y,z≠0) chemical formula. The vibrational bands of these compounds in gas, liquid, solid, and matrix are listed together with their assignments and the relevant references. Most of the literature before October 1991 is covered.
21(1992); http://dx.doi.org/10.1063/1.555917View Description Hide Description
Graphical and tabulated data and the associated bibliography are presented for cross sections for elastic, excitation, and ionizationcollisions of H+, H+ 2, H+ 3, ArH+, H−, H, and H2 with Ar and of Ar+ and ArH+ with H2 for laboratory energies from 0.1 eV to 10 keV. Where appropriate, drift velocities and reaction or excitation coefficients are calculated from the cross sections and are recommended for use in analyses of swarm experiments and electrical discharges. In the case of H+ in Ar, cross sections for momentum transfer, charge transfer, electronic excitation, and electron production are recommended. Drift velocity calculations predict runaway for H+ in Ar for electric field to gas density ratios E/n greater than 4.3×10− 1 8 V m2. For H+ 2 in Ar, the cross sections include those for ArH+ formation, charge transfer, electronic excitation, and electron production. Drift velocities and average cross sections are calculated versus E/n. In the case of ArH+collisions with Ar, only cross sections for ion molecule reactions are recommended. For H−collisions with Ar only collisional detachment data is available. Momentum transfer, electronic excitation, and electron production cross section data are available for collisions of H with Ar. Collisions of H with Ar are of special interest because of the very large cross sections for excitation of the H atoms at low energies. For H2 in Ar cross sections for momentum transfer and excitation of the Hα and Hβ lines are recommended. For Ar+collisions with H2, cross sections for charge transfer and ion molecule reactions are recommended. Cross sections for proton transfer are available for ArH+ in H2.