Answer : The solubility of this gaseous solute will be, 
Explanation :
First we have to calculate the concentration of solute.

Now we have to calculate the Henry's law constant.
Using Henry's law :

where,
C = concentration of solute = 
p = partial pressure = 27.59 kPa
= Henry's law constant = ?
Now put all the given values in the above formula, we get:


Now we have to calculate the solubility of this gaseous solute when its pressure is 79.39 kPa.



Therefore, the solubility of this gaseous solute will be, 