89.4 Determination of the reaction order 9.4.1 Integration methods--trial and error Comment: 1) It is a rather laborious method 2) For reaction without simple order, it is impossible to ascertain reaction order using this method 3)the experimental error may cause confusion sometimes
1) It is a rather laborious method 2) For reaction without simple order, it is impossible to ascertain reaction order using this method. 3) the experimental error may cause confusion sometimes. Comment: 9.4.1 Integration methods—trial and error §9.4 Determination of the reaction order
89.4 Determination of the reaction order 9.4.1 Integration methods--graphic method (2)The graphic method The rate equation ofa-> Pcan be expressed as r=kaja The linear relationship of reactions with different orders are different Table 3 kinetic data for A-P t/s c/moldm t/s c/ moldm Reaction order Linear relationship 0 1.000 3000 0.050 zeroth 500 0.606 3500 0.030 first Inc t 1000 0.368 4000 0.018 1500 0.223 4500 0.0 second 1/ct 2000 0.135 5000 0.007 third 1/c2~t 2500 0.082
(2) The graphic method The linear relationship of reactions with different orders are different. Reaction order Linear relationship zeroth c ~ t first lnc ~ t second 1/c ~ t third 1/c 2 ~ t 9.4.1 Integration methods—graphic method §9.4 Determination of the reaction order Table 3 kinetic data for A → P. The rate equation of A → P can be expressed as r = k[A] t / s c / moldm-3 t / s c / moldm-3 0 1.000 3000 0.050 500 0.606 3500 0.030 1000 0.368 4000 0.018 1500 0.223 4500 0.011 2000 0.135 5000 0.007 2500 0.082