Question

The standered free energy of a reaction is found be zero.what is its equilibrium constant?

Answer 1

Concentration of substance,

[substance] =

Thus, concentrations of given substances are,

[N2] = 1.57/20 mol L-1

[H2] = 1.92/20 mol L-1

[NH3] = 8.13/20 mol L-1

For a chemical change,

aA + bB ⇌ cC + dD

Reaction quotient Qc for the reaction is,

Qc =

Where [substance] is concentration of substance at a particular time.

For given reaction

N2 (g) + 3H2 (g)⇌2NH3 (g)

Reaction quotient is,

Qc = =

Qc >Kc . Therefore, the reaction proceeds in reverse direction in order to attain equilibrium. (Equilibrium constant is reaction coefficient at equilibrium state)