If standard free energy change for a reaction is found to be zero what is its equilibrium constant?

What is equilibrium constant ?

At 25^(@)C , the standard free energy change for a reaction is 5.4 kJ. Calculate the value of equilibrium constant of the reaction at the temperature.

It the free energy change for a reaction at 25^@C be 5.4 Kj Calculate the equilibrium constant for the reaction. State wheather the vaporisation of water at 110^@C in 1 atm pressure is a spontaneous or non spontaneous process.

if activation energy of a reaction is zero

"In any reversible reaction, the equilibrium constant for the forward reaction in the reciprocal of the equilibrium constant of the backward reaction"-explain.

lf a chemical reaction occurs in two or more steps, then the equilibrium constant of the net reaction is equal to the product of equilibrium constants of the individual steps.

The values of Delta H and Delta S in vaporisation of water at 1 atm pressure are 40.63 " kJ mol"^(-1) and 108.8 J. K^(-1). " mol"^(-1) respectively. At what temperature the free energy change of the reaction will be zero ? What will be the sign of Delta G below that temperature ?

Calculate the standard emf of the cell having the standard free energy change of the cell reaction is -64.84 kJ for 2 electrons transfer.