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24 September, 09:36

Calculate the value of K p for the equation C (s) + CO 2 (g) - ⇀ ↽ - 2 CO (g) K p = ? given that at a certain temperature C (s) + 2 H 2 O (g) - ⇀ ↽ - CO 2 (g) + 2 H 2 (g) K p 1 = 3.23 H 2 (g) + CO 2 (g) - ⇀ ↽ - H 2 O (g) + CO (g) K p 2 = 0.693

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  1. 24 September, 13:15
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    kp = 1.55

    Explanation:

    To get to this reaction, we just need to sum the other two reactions, and multiply coefficients if it's needed so:

    C (s) + 2H₂O (g) ⇄CO₂ (g) + 2H₂ (g) Kp1 = 3.23 (1)

    H₂ (g) + CO₂ (g) ⇄ H₂O (g) + CO (g) Kp2 = 0.601 (2)

    we will multiply eqn 2 by 2 because we need to eliminate H₂

    2H2 (g) + 2CO2 (g) ⇄ 2H2O (g) + 2CO (g) Kp = (0.601) ²

    Now, add both equation

    C (s) + 2H₂O (g) ⇄CO₂ (g) + 2H₂ (g) Kp1 = 3.23

    2H2 (g) + 2CO2 (g) ⇄ 2H2O (g) + 2CO (g) Kp = (0.601) ²

    we have,

    C (s) + CO₂ (g) ⇄ 2CO (g)

    Now the value of Kp will be:

    kp = 3.23 * (0.693) ²

    kp = 1.55
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