Ordens não inteiras em cinética química


Autoria(s): Oliveira,André P.; Faria,Roberto B.
Data(s)

01/01/2010

Resumo

Starting from zero-, first-, and second-order integrated laws for chemical kinetics, some cases are shown which produce fractional orders. Taking the Michaelis-Menten mechanism as a first example, it is shown that substrate order can go from 1 to zero, depending on relative concentration of enzyme and substrate. Using other examples which show fractional orders higher than one and even negative (inhibition), it is shown that the presence of an equilibrium before or parallel to the rate determining step can be the reason for fractional orders, which is an indication of a more complex mechanism.

Formato

text/html

Identificador

http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422010000600035

Idioma(s)

pt

Publicador

Sociedade Brasileira de Química

Fonte

Química Nova v.33 n.6 2010

Palavras-Chave #chemical kinetics #non-integer orders #homogeneous catalysis
Tipo

journal article