For the reaction 2HI ____________> H2+ I2
Correct answer: C. Kp= kc
- A. Kp > kc
- B. Kc > kp
- C. Kp= kc
- D. Kp ≤ kc
Explanation
For gases, Kp = Kc(RT)^Δn, where Δn = total gaseous product moles - total gaseous reactant moles. For 2HI(g) ⇌ H2(g) + I2(g), Δn = (1 + 1) - 2 = 0, so Kp = Kc(RT)^0 = Kc. The likely wrong choice is Kp > Kc, caused by assuming pressure-based constants are always larger.
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