3.1.10 Equilibrium constant Kp for homogeneous systems - Chemistry Alevel

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13 Terms

1
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Mole fraction - equation

= number of moles of gas A/total number of moles of gas

2
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Mole fraction - symbol

xA (mole fraction of gas A & subscript)

3
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Partial pressure - symbol

PA (subscript)

4
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Dalton's law - equation

Total pressure P = PA + PB + PC + ... = ∑Partial pressures of all gases in container

5
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Partial pressure - equation

PA = mole fraction of A x total pressure

6
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Partial pressure - units

Pa (Pascals) = Nm⁻²

7
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Kp - concentration effect

None

8
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Kp - units

The milli or kilo etc... are not changed by the power of Pa.

9
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Kp - heterogeneous equilibria

Just don't include any compound that isn't gaseous.

10
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Kp - pressure effect

None

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Kp - catalyst effect

None

12
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Kp - temperature effect - forward exothermic

Temperature increases ∴ Kp falls.

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Kp - temperature effect - forward endothermic

Temperature increases ∴ Kp increases.