Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Problems and Concept Questions

The Marrone-Treanor parameter U is constant only overa narrow range of temperatures. Details about two-temperature dissociation kinetics for To TV can be found in Sergievska, Kovach, Losev (1995). [Pg.89]

Coulomb Collisions. Using integral relation (2-7), try to calculate the rate coefficient for electron-electron Coulomb collisions in plasma with electron temperature = eV. Assume the Maxwellian distribution function (2-1) for plasma electrons and take expression (2-8) for the Coulomb collisions cross section. Analyze the contribution of slow and fast electrons in the Coulomb collision reaction rate. [Pg.89]

Ionization by Direct Electron Impact, Thomson Formula. Compare cross sections of the direct ionization by electron impact calculated using different modifications of the Thomson formula (2-11), (2-13), and (2-14). Calculate the maximum values of the cross sections and corresponding values of electron energy for each of the Thomson formula modifications. [Pg.89]

Stepwise Ionization by Electron Impact. Estimate a stepwise ionization rate coefficient in Ar at electron temperatures of 0.5 and 1 eV, assuming quasi-equilibrium between plasma electrons and electronic excitation of atoms. Comment on why the stepwise ionization is a preferential one in thermal plasmas and less important in non-thermal discharges. [Pg.89]

Ionization in Collisions of Heavy Particles. Estimate the adiabatic Massey parameter and ionization probability and cross section for ionization of an Ar atom at rest in collision with an Ar+ ion having kinetic energy twice that of the ionization potential. Compare the ionization probability in this case with the one for the Penning ionization. [Pg.89]


See other pages where Problems and Concept Questions is mentioned: [Pg.89]    [Pg.89]    [Pg.91]    [Pg.155]    [Pg.155]    [Pg.257]    [Pg.257]    [Pg.351]    [Pg.351]    [Pg.353]    [Pg.414]    [Pg.415]    [Pg.496]    [Pg.497]    [Pg.586]    [Pg.587]    [Pg.674]    [Pg.675]    [Pg.753]    [Pg.753]    [Pg.846]    [Pg.847]    [Pg.912]    [Pg.913]    [Pg.981]    [Pg.1021]   


SEARCH



Questions and problems

© 2024 chempedia.info