engineering chemistry MCQ #2163

For the reaction CO2 + H2 ⇌ CO + H2O, if Kc = 0.1 and initial concentrations of CO2 and H2 are 1 M each, what is [CO] at equilibrium?

engineering chemistry MCQ #2163

  1. Question 1

    Q1. For the reaction CO2 + H2 ⇌ CO + H2O, if Kc = 0.1 and initial concentrations of CO2 and H2 are 1 M each, what is [CO] at equilibrium?

    • A) 0.27 M
    • B) 0.3 M
    • C) 0.25 M
    • D) 0.2 M

    Answer: 0.27 M

    Explanation: Using Kc = [CO][H2O]/[CO2][H2] and assuming x M react, 0.1 = x²/(1-x)², solving gives x = 0.27.