Question

According to Henry's law, the partial pressure of gas (P${}_{gas}$) is directly proportional to mole fraction of gas in dissolved state, i.e., $P_{gas}=K_H.X_{gas}$, where $K_H$ is Henry's constant. Now, choose the correct option(s).

• A. $K_H$ is characteristic constant for a given gas-solvent system.
• B. Higher is the value of $K_H$, lower is the solubility of gas for a given partial pressure of gas.
• C. $K_H$ is temperature dependent.
• D. $K_H$ increases with temperature.

Answer 1

Answer: (A), (B), (C), (D)

The correct options are
A Higher is the value of $K_H$, lower is the solubility of gas for a given partial pressure of gas.
B $K_H$ is characteristic constant for a given gas-solvent system.
C $K_H$ is temperature dependent.
D $K_H$ increases with temperature.

A) The value of Henry's law constant depends on the gas-solvent system. It is different for different gas-solvent systems.

B) For a given partial pressure of the gas, as the value of $K_H$ increases, the value of the mole fraction decreases and the solubility also decreases. Hence, higher is the value of $K_H$, lower is the solubility of gas for a given partial pressure of the gas.

C) The value of $K_H$ depends upon temperature.

D) With an increase in the temperature, the value of $K_H$ increases.