Two sealed, rigid 1.0 L flasks each contain 0.50 mol of the same ideal gas. Flask A…
CHEMISTRY · Single correct · AP · Chemistry · Properties of Substances and Mixtures · Properties of Substances and Mixtures
Problem
Two sealed, rigid 1.0 L flasks each contain 0.50 mol of the same ideal gas. Flask A is at 298 K, and Flask B is at 596 K. Which of the following best explains why the collision frequency with the container walls is greater in Flask B than in Flask A?
(a) The higher temperature in Flask B decreases the mean free path, so particles strike the walls more often.
(b) Because P=VnRT, the higher temperature in Flask B produces a higher pressure, which in turn causes more frequent collisions with the container walls.
(c) Gas particles in Flask B have higher average speeds, leading to more frequent impacts per unit time.
(d) Heating the gas in Flask B effectively doubles the amount of gas present, giving more molecules that can collide with the container walls.