For the reaction in problem (2) calculate the degree of dissociation alpha= (number of moles of PCI, dissociated at equilibrium) / (original number of moles of PCs in the system) at T = 400 K and P = 1 atm. Assume that in the conditions of the problem the equilibrium gas mixture behaves as an ideal gas mixture. O a. 0.97 O b.0.87 O c. 0.15 O d. 0.051 O e. 3.51