Chemistry - Real Gas Question with Solution | TestHub
Statement 1: If the intermolecular attraction between gas molecules in a vessel of fixed volume vanishes at constant temperature, the pressure of gas will increase.
Statement 2: The speed at which the gas molecules are colliding at the walls will increase on disappearance of attractive forces.
Options:
Answer:
Solution:
A molecule approaching a wall feels a net inward pull from the molecules behind it, which decelerates it, so it strikes the wall more slowly than its bulk speed. If the attractions vanish, this deceleration disappears and the molecules hit the walls at their full speed — Statement 2 is correct in this kinetic picture. Faster wall impacts transfer more momentum per collision, raising the pressure (toward the ideal value) — Statement 1 is correct and is explained by II. This is the basis of the pressure correction Pideal = Preal + an2/V2. Ans: (a).
