79. In a state of equilibrium in the system
N2(g) 3H2(g) ↔ 2NH3(g) ;
ΔН°= -92.4 kJ, the concentrations of the substances involved are: [N2]=3 mol/l; [H2]=9 mol/l; [NH3]=4 mol/l. Define:
a) initial concentrations of hydrogen and nitrogen;
b) in what direction will the equilibrium shift with increasing temperature?
c) in what direction will the equilibrium shift with increasing pressure?

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