Determination of thermodynamic functions for activation

Detailed calculations using partition functions, calculated from spectroscopic data for reactants and the PE surface for the activated complex, allows K, AG , AH, AS and AV to be found. Experimental data can give experimental values to compare direct with the theoretical ones. Equation (4.41) gives 

Similarly, the effect of pressure on the rate constant gives AV for reactions in solution. Equation (4.40) gives 

Note the partial derivatives here, ( 91oge k/dp)T and (dAG / dp)T where k varies with p at constant 71 and AG varies with p at constant 71 

---