The equilibrium constant k p for the reaction H2(g)+CO2(g)⇌H2O(g)+CO(g) is 4.0 at 1660oc. Initially 0.80 mole H2, and 0.80 mole CO2, are injected into a 5.0 liter flask. What is the equilibrium concentration of CO2(g)?

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0.533 M

0.0534 M

0535 M

None of these

answer is B.

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Detailed Solution

H2(g) + CO2(g) ⇌ H2O(g) + CO(g) moles of eq. 0.8 -x 0.8-x x x conc, at eq. 0.8-x5 0.8-x5 x5 x5 ∵Δng=0 ∴ Kc=x520.8-x52 ⇒ 2=x0.8-x ⇒ x=0.533 CO2(g)=0.8-0.5335

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