Determine the value of equilibrium constant (Kc) for the reaction A2(g)+B2(g)⇌2AB(g) If 10 moles of A; 15 moles of B, and 5 moles of, AB are placed in a 2 liter vessel and allowed to come to equilibrium. The final concentration of AB is 7.5 M

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4.5

1.5

0.6

None of these

answer is A.

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Detailed Solution

A2(g) + B2(g) ⇌ 2AB(g) lnitial conc. ; 10/2 15/2 5/2 at eq. ; 5-x 7.5-x 2.5+2x ∵ 2.5+2x=7.5 ⇒ x=2.5 Kc=(7.5)22.5×5=4.5