The reaction equilibrium constant
N2(g) + 3H2(g) = 2NH3(g)
at 400°C is equal to 1.60  10-4. Calculate (a) the value of ∆rGº and (b) ∆rG when the
N2 and H2 pressures are maintained at 10 and 30 bar, respectively; and NH3 is
removed at a partial pressure of 3 bar and (c) under these conditions the reaction
described above is spontaneous? Assume R = 8.3145 J K-1 mol-1 .