Determine the equilibrium constants kp and kc

Question

Compute the Haber synthesis of gaseousNH₃:
 N₂(g) + 3H₂(g) → 2NH₃(g)

For ammonia, Delta H° f= -46.1 kJ/mol; and Delta G° f= -16.5 kJ/mol.
1. Use only these data to determine the Delta H° and Delta S° for the reaction at the 25°C.

2. Account for the sign of Delta S°.

3. Is the reaction spontaneous under standard-state conditions at the 25°C? Explain.

4. Determine the equilibrium constants K_p and K_c for the reaction at the 350 K?