The balanced equation for the reaction of ammonia and oxygen is the following.
4 NH₃(g) + 5 O₂(g) → 4 NO(g) + 6 H₂O(g)

a. The standard molar entropies for the products and reactants are listed below. Calculate the change in standard molar entropy for this reaction at 298.0 K and standard pressure, in J/mol·K.