Chemical Activities, a(H) and a(X), of Constituents in H₂X Type Gas Molecules (X = O or S) at Arbitrary Degree of Dissociation

摘要

Chemical activities, a(X) and a(H), of constituents, X and H, in H₂X type gas molecules (X = S or O) were evaluated as functions of temperature T and extent α of dissociation adapting a thermodynamic analysis procedure developed by Katsura for interpreting enhanced a(N) and a(H) in NH₃ gas molecules with suppressed α by flowing. Present analysis results showed that both H₂S and H₂O gas molecules are chemically rather inert even at comparatively low α unlike nitrogen-family tri-hydrides XH₃ that were proved to yield high chemical activity of each constituent in a state being away from thermodynamic equilibrium. The parameter α referring to the extent of dissociation of H_nX type gas molecules appears to be a significant parameter in evaluating the chemical activities, a(X) and a(H), in the H_nX gas molecules that are remained non-dissociated.