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Convert between Kp and Kc using the change in gas moles

This type of question, asked 5 times: 2021 Paper 13, 31 Jan 2023, 29 Jan 2024, 6 Apr 2024, 23 Jan 2026 S1. All 5 questions below, oldest first.

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  1. Question 1

    2021 Paper 13

    43
    For N2O4(g)⇌2NO2(g)N_{2}O_{4}(g)\rightleftharpoons 2NO_{2}(g), KP=476K_{P}= 476. Find KCK_{C} at 288 K288\text{ }K. (Nearest integer)

  2. Question 2

    31 Jan 2023

    57
    For reaction: SO2( g)+12O2( g)⇌SO3( g)SO_{2}(\text{ }g) +\frac{1}{2}O_{2}(\text{ }g) \rightleftharpoons SO_{3}(\text{ }g) Kp=2×1012K_{p}= 2 \times10^{12} at 27∘C27^{\circ}C and 1 atm1\text{ }atm pressure. The KcK_{c} for the same reaction is ____\_\_\_\_ ×1013\times10^{13}. (Nearest integer) (Given R=0.082 L atm K−1 mol−1R = 0.082\text{ }L\text{ }atm{\text{ }K}^{- 1}{\text{ }mol}^{- 1} )

  3. Question 3

    29 Jan 2024

    54
    For the reaction N2O4( g)⇌2NO2( g)N_{2}O_{4}(\text{ }g) \rightleftharpoons 2NO_{2}(\text{ }g), Kp=0.492 atmK_{p}= 0.492\text{ }atm at 300 K.Kc300\text{ }K.K_{c} for the reaction at same temperature is ____ ×10−2\times10^{- 2}. (Given: R=0.082 L atm mol−1 K−1R = 0.082\text{ }L\text{ }atm{\text{ }mol}^{- 1}{\text{ }K}^{- 1} )

  4. Question 4

    6 Apr 2024

    140
    The ratio KPKC\frac{K_{P}}{K_{C}} for the reaction: CO(g)+12O2( g)⇌CO2( g)CO_{(g)}+\frac{1}{2}O_{2(\text{ }g)}\rightleftharpoons CO_{2(\text{ }g)} is:

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  5. Question 5

    23 Jan 2026 S1

    45
    Consider the general reaction given below at 400 K
    xA(g)⇌yB(g)xA(g) \rightleftharpoons yB(g)
    The values of KpK_{p} and KcK_{c} are studied under the same condition of temperature but variation in x and y . (I) Kp=85.87K_{p}= 85.87 and Kc=2.586K_{c}= 2.586 appropriate units (II) Kp=0.862K_{p}= 0.862 and Kc=28.62K_{c}= 28.62 appropriate units The value of xx and yy in (I) and (II) respectively are:

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