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For the reaction 2C(s) + O2(g) ⇌ 2CO2(g), Δn = 2 - 1 = 1. Which of the following is correct?

1. Kc = Kp
2. Kc > Kp
3. Kc < Kp
4. Kc and Kp are not equal

Correct answer: Kc = Kp

Solution

In the given reaction, Δn (change in the number of moles of gas) is 0 because there are 2 moles of gaseous CO2 on the product side and 1 mole of gaseous O2 on the reactant side. When Δn = 0, Kc equals Kp.

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