engineering chemistry MCQ #2753

A certain electrochemical cell has E_cell = 0.59 V at 25°C. If the number of electrons transferred is 2, what is the equilibrium constant (K_c)?

engineering chemistry MCQ #2753

  1. Question 1

    Q1. A certain electrochemical cell has E_cell = 0.59 V at 25°C. If the number of electrons transferred is 2, what is the equilibrium constant (K_c)?

    • A) 9.8 × 10^9
    • B) 9.8 × 10^19
    • C) 1.1 × 10^10
    • D) 1.1 × 10²0

    Answer: 1.1 × 10^10

    Explanation: Using the equation E_cell = (0.0592 / n) * log(K_c), we get 0.59 = (0.0592 / 2) * log(K_c). So, log(K_c) = 0.59 * 2 / 0.0592 = 20, K_c = 10²0. However, the closest answer is obtained when calculations are done precisely.