Consider the reaction: n2(g) + 3 f2(g) → 2 nf3(g) δh° = -249 kj and δs° = -278 j/k at 25°c calculate δg° and state whether the equilibrium composition should favor reactants or products at standard conditions.

Answer : The value of  is -166156 J and equilibrium composition should favor products at standard conditions.

Explanation :

Now we have to calculate the Gibbs free energy.

As we know that,

where,

= standard Gibbs free energy  = ?

= standard enthalpy = -249 kJ = -249000 J

= standard entropy = -278 J/K

T = temperature of reaction =

Now put all the given values in the above formula, we get:

As the value of is less than zero that means the reaction is spontaneous and reaction will be favored in the forward direction that means favored in products.

Hence, the value of  is -166156 J and equilibrium composition should favor products at standard conditions.