. Value of Henrys constant KH


A: increases with increase in temperature

B: decreases with increase in temperature

C: remains constant

D: first increases then decreases

 

Best Answer

Explanation: 

Henry’s Law: It states that, at constant temperature, the amount of gas dissolved in a liquid is directly proportional to the partial pressure of that gas above the liquid.

It also states that the partial pressure of gas in its vapour phase is directly proportional to the mole fraction of the gas in the solution.

Mathematically, Henry’s law is given as,

P = KHX

where,

p = partial pressure of gas in vapour phase

KH = Henry's constant

X = mole fraction of gas in the solution

Henry’s constant of a gas is a function of nature of gas, nature of solvent, temperature and pressure.

As Temperature (T) increases, the mole fraction of gas in the solution decreases and Henry’s constant increases.

Final Answer:

The correct option is A: increases with increase in temperature.

 

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