#### The reaction is begun with the concentrations of A and B both at an initial value of 1.00M. When equilibrium is reached, the concentrations of D is measured and found to be 0.25M. The value for the equilibrium constant for this reaction is given by the expression Option 1) Option 2) Option 3) Option 4)

As we discussed in concept

Law of Chemical equilibrium -

At a given temperature, the product of concentration of the reaction products raised to the respective stoichiometric coefficient in the balanced chemical equation divided by the product of concentration of the reactants raised to their individual stoichiometric coefficients has a constant value.

- wherein

are equilibrium concentration

2A (g)   + B (g)                 3C(g) + D(g)

Initial                1          1                           0            0

At Equilibrium  1-(2x.25) 1-0.25                  3x0.25    0.25

= 0.5            = 0.75                 = 0.75

Equilibrium constant K =

K =

Option 1)

This option is incorrect.

Option 2)

This option is incorrect.

Option 3)

This option is correct.

Option 4)

This option is incorrect.