Equilibrium constant and thermodynamic relationship Why is Equilibrium constant (Ratio of rate constants) considered as a thermodynamic quantity whereas the rate constant as kinetic quantity. Moreover why is extent of reaction also a thermodynamic quantity.?
Please explain briefly as I'm stuck.
Well first think of thermodynamics as determining what a system wants to do, and kinetics as what the system is allowed to do.  The rate  constant gives how fast something will react (kinetic rate).  The thermodynamic equilibrium constant gives how much of something will react.  Kinetics are dictated by the movements of atoms, Thermodynamics is dictated by the changes in energy and entropy.