Question

why is there constant temperature and pressure at equilibrium? how do we know this

Answer 1

Ans :

Equilibrium is a state in the reaction where the rate of forward reaction is equal to the rate of backward reaction. In such a state the concentration of species do not change though the reactions are still going on but at similar rates.

At such a state the reaction pressure and temperature remains constant. If these two things change , the rate of reactions can vary , and hence the reaction does not stay at the equillibrium state any longer.

In such a case the reaction either favors reactants or it favors the products , so that the equillibrium can be re-estabilished again.

If the reaction in equillibrium state suddenly starts make either of reactant or product species more , it is indicative of any change in the reaction temperature or pressure conditions.