Which of the following is not a unit of the equilibrium constant Kp? (where, Δx = number of moles of products number of moles of reactants) ?
Correct answer: D. (atm)Δx2, when Δx > 0
- A. (atm)Δx, when Δx is negative
- B. (atm)Δx, when Δx is positive
- C. Dimensionless, when Δx = 0
- D. (atm)Δx2, when Δx > 0
Explanation
For gaseous reactions, the pressure dependence of Kp is proportional to (pressure unit)^Δx, where Δx is moles of gaseous products minus reactants. The exponent Δx squared has no thermodynamic basis, so option d is not a valid unit form.
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