79. The decomposition reaction of phosphorus pentachloride proceeds according to the equation:
PCl5(G) ↔ PCl3(G) CL2(G); ΔН= 92.6 kJ. How to change: a) temperature; b) pressure; c) the concentration of substances to shift the equilibrium to the left? Write an expression for the equilibrium constant of the system. In which case will it change? Why?

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