What is the unit of Henry's law constant?

What is the unit of Henry's law constant?
  1. $\mathrm{mol} \mathrm{dm}^{-3}$
  2. $\mathrm{mol} \mathrm{dm}^3 \mathrm{bar}^{-1}$
  3. $\mathrm{mol} \mathrm{dm}^{-3} \mathrm{bar}^{-1}$
  4. $\mathrm{mol} \mathrm{dm}^{-3} \mathrm{bar}$

Solution

$\mathrm{S}=\mathrm{P} \times \mathrm{K}_{\mathrm{H}}$ $\mathrm{K}_{\mathrm{H}}=\frac{\mathrm{mol}}{\mathrm{dm}^3} \times \frac{1}{\mathrm{bar}}$

Asked in: MHT CET 2022 (06 Aug Shift 1)

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