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Previous Figure Next Figure. Email or Customer ID. Forgot password? Which of the following elementrary reactions is a termolecular reaction? True or False: Given species A and B inside a container, instruments detect that three 3 collisions occured before product was formed. That is, we know a reaction occured after detecting three collisions in a box.
Solutions 1. Non-elementary steps, or complex reactions, are sets of elementary reactions.
12.6 Reaction Mechanisms
The addition of elementary steps produces complex, non-elementary reactions. The correct statements are "a" and "e". By definition of elementary reactions they have 0 intermediates because they cannot be broken down. Again by definition of an elementary reaction, a single-step reaction will have 1 transition state. There is no reaction with 0 transition states.
Having 2 transition states implies having 1 intermediate, making the reaction non-elementary. The molecularity of a reaction MUST be an integer because there cannot be a "half particle" producing a reaction.
Compton (ed), Bamford (ed) & Tipper† (ed), Selected Elementary Reactions, 1e
False; nothing can be concluded. Although a termolecular reaction requires the collision of three particles, the reverse logic is not necessarily true. That is, having three collisions is not sufficient for a termolecular reaction. However, particle B was in the wrong orientation, so no reaction occurred. Instead, the two A particles were in the correct orientation and produced a reaction, which is a bimolecular reaction. Instead, a third collision between A and B had the sufficient energy and correct orientation to produce a reaction.
Such a reaction is, again, only bimolecular. A last example: particle A collides twice with a wall, and then once with B to produce a reaction.
Such a reaction involving three collisions at different places and different time is only a bimolecular reaction. References Chang, Raymond.
Selected Elementary Reactions, Volume 18
Sansalito, CA: University Science, Olbregts, J. International Journal of Chemical Kinetics, — Kerr, James Alistair. Baer, Tomas, and William L.
New York: Oxford University Press, Elementary Reaction one step. Two Step Reaction.