Degree of dissociation α from Kp (gas, Δn ≠ 0) (A(g) ⇌ B(g)+C(g): Kp = α²P/(1−α²) when starting from pure A)
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A(g) ⇌ B(g)+C(g): Kp = α²P/(1−α²) when starting from pure A
What each symbol means
| Symbol | What it stands for |
|---|---|
| α | Degree of dissociation of A |
| K_p | Equilibrium constant in pressure units |
| P_{tot} | Total equilibrium pressure |
When to use this
Start with pure A; ideal gases; mole fractions: B and C each α/(1+α), A is (1−α)/(1+α).