Calculate the free energy change, ?G for the formation of ethylene(C2H4) from carbon and hydrogen at 25°C when the partial pressures are 10 atm H2 and 2.0Atm C2H4 then tell whether the reaction is spontaneous in the forward direction or not
2C(s) + 2H2(g) --------->C2H4(g) ?G = 68.1 kJ