Why Does the Equilibrium Constant Depend Only on Temperature?

[Scharles]

why the equilibrium constant only depending on temperature but not concentration and partial pressure ?

Since K= [product]/[reactants], why the value of K remain the same as [product]or [reactant] increase ?

 

[Borek]

When you add products or reactants Q - so called reaction quotient, defined identically as K - changes its value. However, after that system will react and concentrations of products and reactants will change till Q=K. K describes system at equilibrium, Q describes system at any moment.

 

[Scharles]

isn't mean that the ratio of [products] / [reactants] remain unchanged after the system is adjusted to equilibrium ??

 

[Borek]

isn't mean that the ratio of [products] / [reactants] remain unchanged after the system is adjusted to equilibrium ??

System is not adjusted, system adjusts itself. It is not just ratio of products/reactants we are talking about, but reaction quotient, which is more complicated than simple ratio. And finally this is not a correct phrase and I have troubles trying to decipher what you are asking about. Please elaborate.