Question

" 0.003 moles of a gas are dissolved in 900 g of water under a pressure of 1 atm . Also, 0.006 moles of same gas get dissolved in 900 g of water under a pressure of 2 atm"
Considering the above statement to be true, it illustrates the applicability of :

• A. Dalton's law of partial pressure
• B. Henry's Law
• C. First Law of thermodyanics
• D. Graham's Law of diffusion

Answer 1

The correct option is B Henry's Law

Henry's law states that :
“The solubility of a gas in a liquid at a given temperature is directly proportional to its partial pressure of the gas present above the solution”
According to the statement when the pressure above the solution is 1 atm, 0.003 moles are dissolved, when the pressure is doubled, the solubility is also doubled.
So,
$\text{Solubility}\propto \text{Pressure}$

Thus the above statement confirms the applicability of Henry's law.