Addendum G: Ultrafast chemical reactions in the liquid state

1988 ◽  
pp. 461-469
Author(s):  
P.F. Barbara ◽  
Kenneth B. Eisenthal
Keyword(s):  
Chemical Reactions ◽  
Liquid State

THE DISCONTINUITY IN THE VELOCITY COEFFICIENT OF A CHEMICAL REACTION AT THE CRITICAL TEMPERATURE

1931 ◽  
Vol 5 (1) ◽  
pp. 48-63 ◽  
Author(s):  
H. S. Sutherland ◽  
O. Maass
Keyword(s):  
Critical Temperature ◽  
Chemical Reactions ◽  
Chemical Reaction ◽  
Experimental Work ◽  
Liquid State ◽  
High Pressures ◽  
Gaseous State ◽  
Velocity Coefficient ◽  
New Hypothesis ◽  
Orientation Of Molecules

An account is given of an hypothesis dealing with the mechanism of chemical reactions. This hypothesis was the raison d'être for the experimental work, which consisted in measuring the rate of a chemical reaction in a system over a temperature range including the critical temperature and under conditions such that there was a continuity of concentration, when passing from the liquid to the gaseous state of aggregation.An experimental technique for the investigation of reaction mixtures under high pressures and at relatively high temperatures was developed. This method includes several new features which should find considerable application in investigations of this kind.In the reaction investigated, viz., that between propylene and hydrogen chloride, it was conclusively shown that the velocity of the reaction increases with rise in temperature in the liquid state, and that above the critical temperature the velocity of the reaction becomes practically zero. A new hypothesis was put forward with the object of suggesting further work. It depends on regional orientation of molecules in the liquid state which undergoes a rapid diminution at the critical temperature.

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