Question

relation between henry's constant and solubility of gas

Answer 1

Answer:

Henry's Law states that:

Pgas=Khx  

⇒Kh=Pgas/x  

Here,  x is the mole fraction of the gas dissolved in the solvent, and  Pgas happens to be the partial pressure of the gas over the solution.

Now let us assume that the entire system is open, say, we've kept the solution of gas in liquid in an open container, effectively ensuring that  Pgas is a constant. Let's vary the temperature. As you can see in the above relation,  Kh must vary inversely with mole fraction to keep the partial pressure constant.

Hence, we conclude that the Henry's Law constant varies inversely with mole fraction, which is a measure of solubility. Clearly, the value of  Kh rises with an increase in temperature, and vice-versa.

Explanation: