Stability, conditions higher order mechanical

These are the higher order conditions for mechanical stability, which, as we shall see in chap. XVI, are satisfied at the critical point of a substance. 

While isolated laboratory experiments involving reactions which may be important in flames provide information under controlled conditions, these conditions may be somewhat removed from those which are found in flames. Clearly our reaction rate determinations should be extended to higher temperatures, which may cause the association reactions seen to have lower rates, due to dissociation of the ion/molecule reaction complexes formed. Also, studies at higher pressures should be performed, where there is increased opportunity for collisional stabilization of the collision complexes. As data from work in our laboratories and those of others accumulate, they can be used to refine computational models such as those already reported (10), in order to more fully test the proposed ionic soot formation mechanism. 

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