As shown in Table 15.2, Kp for the equilibrium

is 4.51 × 10-5 at 450 oC. For each of the mixtures listed here, indicate whether the mixture is at equilibrium at 450 oC. If it is not at equilibrium, indicate the direction (toward product or toward reactants) in which the mixture must shift to achieve equilibrium.
(a) 98 atm NH3, 45 atm N2, 55 atm H2
(b) 57 atm NH3, 143 atm N2, no H2
(c) 13 atm NH3, 27 atm N2, 82 atm H2?