Determine the equilibrium constant, Kgoal, for the reaction 4PCl5(g)?P4(s)+10Cl2

Question

Determine the equilibrium constant, Kgoal, for the reaction 4PCl5(g)?P4(s)+10Cl2(g), Kgoal=? by making use of the following information: P4(s)+6Cl2(g)?4PCl3(g), K1=2.00×1019 PCl5(g)?PCl3(g)+Cl2(g), K2=1.13×10?2

Determine the equilibrium constant, K goal, for the reaction goal s 4PC15 (g) P1(s) +10C12(g), Kgoal? by making use of the following information: 1.P4(s) + 6C12 (g) 4PCI3 (g), 2.PCk(g) PClg (g) + C12(g), K1 = 2.00 × 1019 K2 =1.13 x 10-2 Express your answer numerically. goal Submit Hints My Answers Give Up Review Part

Explanation / Answer

Multiply the second equation by 4,

4PCl5(g) <==> 4PCl3(g) + 4Cl2(g) ....... K2 = (1.13 x 10^-2)^4 = 1.63 x 10^-8

Invert the first equation,

4PCl3(g) <==> P4(g) + 6Cl2(g) ............ K1 = 1/2 x 10^19 = 5 x 10^-20

Add both equations,

4PCl5(g) <==> P4(g) + 10Cl2(g) ...... Kgoal = (1.63 x 10^-8)(5 x 10^-20) = 8.15 x 10^-28

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