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Pyrolytic production of Se ( 3 P ) from carbon diselenide. I. Equilibrium
Author(s) -
Marquart J. R.,
Belford R. L.,
Fraenkel H. A.
Publication year - 1977
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.550090415
Subject(s) - chemistry , diselenide , dissociation (chemistry) , pyrolytic carbon , photoionization , pyrolysis , analytical chemistry (journal) , thermodynamics , radiochemistry , organic chemistry , ionization , selenium , ion , physics
Thermodynamic characteristics of the dissociation of carbon diselenide are examined. Results of a shock‐tube study of CSe 2 pyrolysis are combined with previously unreported photoionization spectroscopy data on CSe 2 and with a critical examination of the available literature on Se( g ), Se 2 ( g ), CSe( g ), CSe 2 ( g ), and CSe 2 ( t ). Based on the best currently available information, recommendations are made for the values of enthalpies, entropies, heat capacities, and derived functions. In particular, the most likely value for Δ H 0 (CSe 2 ( g ) → CSe( g ) + Se( g , 3 P )) is +83 kcal/mol, and for K p at 2000°K it is 0.018 atm.