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Properties of the Equilibrium Constant

AP Chemistry· difficulty 4/5

For 2 NO2_2(g) ⇌ N2_2O4_4(g), Δn(gas) = 1 − 2 = −1. The relation between Kp and Kc is

  • A

    Kp = Kc

  • B

    Kp = Kc2^2

  • C

    Kp = Kc(RT)Δn^{Δn} = Kc/(RT)

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  • D

    Kp = Kc × RT

Explanation

Kp=Kc(RT)ΔnK_p = K_c (RT)^{\Delta n} where Δn = mol gas products − mol gas reactants. Here Δn = −1, so Kp=Kc/(RT)K_p = K_c/(RT).

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