Question

When a gas dissolves in liquid, there is decrease in volume thus:

• A. increase of pressure will favour the dissolution of gas in liquid
• B. increase of pressure will not favour the dissolution of gas in liquid
• C. increase of pressure has no affect on the dissolution of gas in liquid
• D. increase of temperature will favour the dissolution of gas in liquid

Answer 1

Answer: (A)

increase of pressure will favour the dissolution of gas in liquid

When a gas dissolves in liquid, there is decrease in volume thus increase of pressure will favour the dissolution of gas in liquid. Initially total volume decreases, the pressure decreases. Now when pressure is increased, the system will shift in a direction that will decrease the pressure to nullify the effect of increase in pressure. This is through the dissolution of gas in liquid. This is similar to Le-chatellier's principle for chemical equilibrium.

Note:

Decrease of temperature will favour the dissolution of gas in liquid.