Which one of the following gases has the lowest value of Henry's law constant?
Which one of the following gases has the lowest value of Henry's law constant?
$\mathrm{N}_{2}$
He
$\mathrm{H}_{2}$
$\mathrm{CO}_{2}$
Solution
According to Henry's law the mass of a gas dissolved per unit volume of solvent is proportional to the pressure of the gas at constant temperature $\mathrm{m}=\mathrm{Kp}$ i.e. as the solubility increases, value of Henry's law constant decreases. Since $\mathrm{CO}_{2}$ is most soluble in water among the given set of gases. Therefore $\mathrm{CO}_{2}$ has the lowest value of Henry's law constant.
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