121. Solving a chemistry problem

Calculate the change in standard Gibbs free energy and draw a conclusion about the direction of the process at the specified temperature. Calculate the temperature of equal probability of direct and reverse processes. Make a conclusion about the direction of the process above and below this temperature.
Use reference data to solve. Ignore the temperature dependence of △H and △S.
N₂ ( r ) Н₂ ( r ) ↔ NH₃ ( r ) 650°C.