PKRM THEORY

▪This theory purpose by Rice , Ramspagar, Kassils , and Marcus.
▪RRKM Purpose theory to solve the weakness of Lintman and Hinshelwood
theory.
▪This theory show the difference between energyed molecule [ A* ] and
activated molecule [ A** ].
▪in the energyed molecule , the amount of energy is distributed among the
normal mode of vibration.
▪The normal modes are couple ,so the energy can follow free between then
when A* convert into A**.
▪A* ---------> A** depend upon the stetical factor.
▪During the collision activation and deactivation are accurs. a large amount of
energy is transfer from one molecule to another.
K1
A + A <-----------------> A + A*
K2
K3
A* ------------------> A**
K4
A** ----------------> Product
▪Alc.to this theory, all the molecule might have energy to react, emerges distrib‐
utated overall the Morse of mossion of the molecule and the reaction will occur
only when enough of the energy has been into perticular location in the molecule.
▪Rate constant of proportional to this probability.
where ...
 s = No. of mores of mossion of molecule
 E* = energy required for the bond of intensities to brac
where.....
 NC = energy density of degree of freedom.
 Ec = trifical energy in the activated molecule
 Fc = partition function
▪By the help of this theory we can calculate the amount of various normal
modes of vibration and rotation.
Surface tension :-->
 The properties account of which tendence of keep min. no. of
molecule in free surface is difine as Surface tension area.