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22. Impure nickel, refined by smelting sulfide ores in a blast furnace, can be converted into...

22. Impure nickel, refined by smelting sulfide ores in a blast furnace, can be converted into metal from 99.90% to 99.99% pur

22. Impure nickel, refined by smelting sulfide ores in a blast furnace, can be converted into metal from 99.90% to 99.99% purity by the Mond process. The primary reaction involved in the Mond process is: Ni(s) + 4CO(g) = Ni(CO)4(g) For Ni(CO) (g) the AH° = 607 kJ/mol and Sº - 417 J/K mol J/ Kmol, for CO(g) the AH = -110.5 kJ/mol and Sº = 198 J/K mol, and for Ni(s) the Sº = 30.0 J/K.mol at 298 K. The first step of the Mond process involves equilibrating impure nickel with and at about 50°C. The purpose of this step is to convert as much nickel as possible into the gas phase. Calculate the equilibrium constant for the above reaction at 50°C.
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Ans. The given reaction is Nils) + 4.00 (g) 3 Nilco.lu .cg) buiven enthalpy of formation of .. each compound is .. _AHO [ NilOH reaction = AHO [ Products ] - Atol Reactant for the given Reaction Nils) + 4 colo) z Ni Clony Lg) o Hireaction = A HOI NíWe can calculate entropy of reaction using formula As reaction = so [ Products) - 50 [ Reactant] - So [NiCCM)4 4)] - So[ Nils. Alyon = A.Hoxn - JASON Aliran = -165 - 298% (-405X10-31 ___-165 +298 x 405 X 10-3 E-165 + 120.69 Doxn = - 44.31 kJ Equilibr- Alyson = -44.81 KJ = -44-31 x 103 J Thus Ayº = - 20303 X.RT logio Kog g -44.31.x. 103 = -2.303 x 8.314 X - 2988 logo keg g

Equilibrium constant , K = 5.84 ×107

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