Asked in PMC Practice Test 8 (2021) 2021Moderate

Kc and Kp have the same value when reactants and products have same number of_.

Correct answer: D. Moles

  • A. Atoms
  • B. Molecules
  • C. Ions
  • D. Moles

Explanation

Kc and Kp have the same value when reactants and products have the same number of "moles" asKp = Kc (RT)^∆n Since ∆n = 0, RT factor is nullifiedSo Kp = KcOption A, B and C are incorrect

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About Reversible Reactions

A reversible reaction proceeds in both forward and backward directions, so reactants and products continue changing until dynamic equilibrium is established. The topic covers the meaning of equilibrium, the equality of forward and reverse rates, and how concentration, pressure and temperature disturb equilibrium, which is separate from the rate at which equilibrium is reached.

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