객관식
For the reaction CO (g) + Cl2 (g) ⇌ COCl2 (g) with Kc = 255 at 1000 K, if a reaction mixture initially contains a CO concentration of 0.1450 M and a Cl2 concentration of 0.176 M at 1000 K, what is the equilibrium concentration of CO?
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16. Chemical Equilibrium
Equilibrium Constant Calculations
Multiple Choice
What is the equilibrium expression for the reverse photosynthetic conversion of CO2 and O2, given the reaction: 6CO2(g) + 6H2O(l) ⇌ C6H12O6(s) + 6O2(g)?
A
K = [CO2]^6[H2O]^6 / [C6H12O6][O2]^6
B
K = [O2]^6 / [CO2]^6
C
K = [CO2]^6 / [O2]^6
D
K = [C6H12O6][O2]^6 / [CO2]^6[H2O]^6
검증된 단계별 안내1
Identify the given chemical reaction: 6CO2(g) + 6H2O(l) ⇌ C6H12O6(s) + 6O2(g). This is the forward reaction for photosynthesis.
Understand that the equilibrium expression for a reaction is based on the concentrations of the products over the reactants, each raised to the power of their stoichiometric coefficients.
For the reverse reaction, the products and reactants are swapped. The reverse reaction is: C6H12O6(s) + 6O2(g) ⇌ 6CO2(g) + 6H2O(l).
Write the equilibrium expression for the reverse reaction. Since C6H12O6 is a solid, its concentration is not included in the expression. The expression becomes: K = [CO2]^6[H2O]^6 / [O2]^6.
Verify the expression by ensuring that the stoichiometric coefficients are correctly used as exponents in the equilibrium expression, and that only gaseous and aqueous species are included.
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