Which of the Following Expressions Correctly Describes the Equilibrium Constant $\rightleftharpoons$

question 63

Multiple Choice

Which of the following expressions correctly describes the equilibrium constant K_c for the reaction given below?
2 C₂H₂(g) + 5 O₂(g) $\rightleftharpoons$ 4 CO₂(g) + 2 H₂O(g)

• A) \(K _ { \mathrm { c } } = \frac { \left[ \mathrm { CO } _ { 2 } \right] \left[ \mathrm { H } _ { 2 } \mathrm { O } \right] } { \left[ \mathrm { C } _ { 2 } \mathrm { H } _ { 2 } \right] \left[ \mathrm { O } _ { 2 } \right] }\)
• B) \(K _ { \mathrm { c } } = \frac { \left[ \mathrm { C } _ { 2 } \mathrm { H } _ { 2 } \right] ^ { 2 } \left[ \mathrm { O } _ { 2 } \right] ^ { 5 } } { \left[ \mathrm { CO } _ { 2 } \right] ^ { 4 } \left[ \mathrm { H } _ { 2 } \mathrm { O } \right] ^ { 2 } }\)
• C) \(K _ { \mathrm { c } } = \frac { \left[ \mathrm { CO } _ { 2 } \right] ^ { 4 } \left[ \mathrm { H } _ { 2 } \mathrm { O } \right] ^ { 2 } } { \left[ \mathrm { C } _ { 2 } \mathrm { H } _ { 2 } \right] ^ { 2 } \left[ \mathrm { O } _ { 2 } \right] ^ { 5 } }\)
• D) \(K _ { \mathrm { c } } = \frac { 4 \left[ \mathrm { CO } _ { 2 } \right] + 2 \left[ \mathrm { H } _ { 2 } \mathrm { O } \right] } { 2 \left[ \mathrm { C } _ { 2 } \mathrm { H } _ { 2 } \right] + 5 \left[ \mathrm { O } _ { 2 } \right] }\)
• E) \(K _ { \mathrm { c } } = \frac { 2 \left[ \mathrm { C } _ { 2 } \mathrm { H } _ { 2 } \right] + 5 \left[ \mathrm { O } _ { 2 } \right] } { 4 \left[ \mathrm { CO } _ { 2 } \right] + 2 \left[ \mathrm { H } _ { 2 } \mathrm { O } \right] }\)

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