4 mol of PCl5 is heated at constant temperature in a closed container . if degree of dissociation of pcl5 is 0.5 then calculate the total number of moles at equilibrium ? Share with your friends Share 19 Vartika Jain answered this Dear Student, PCl5 ↔ PCl3 + Cl2Initial C 0 0 At equil. C(1-α) Cα CαTotal number of moles at equilibrium = C(1-α)+Cα+Cα=C(1+α)Here, α= 0.5C=4Therefore, Total number of moles= 4(1+0.5)=4(1.5)=6 mol Regards 124 View Full Answer