Gibbs Free Energy and S for NO production?

Question

1. Use a table of thermodynamic properties to determine S° and G°at 298K for the following reaction:

4NH3(g) + 5O2(g) ---> 4NO(g) + 6H2O(g)

Find delta S°

Find delta G°

Estimate the value of delta G° at 400 K.

For S°, I think I can do product-reactant with the S° found in the table. That would be 4(S° NO) + 6 (S° H2O) - 5 (S° O2) - 4 (S°NH3). However, this gives an answer in J/K, and the problem asks for the answer in J/(mol*K).

How do I figure out the moles part of this problem?

Answer 1

Use standard moles to solve the equation.