A rigid, evacuated vessel of negligible mass is simultaneously filled with equal…
CHEMISTRY · Multi-part · A Level · Chemistry · Amount of substance · Amount of substance
Problem
A rigid, evacuated vessel of negligible mass is simultaneously filled with equal numbers of nitrogen molecules and neon atoms until the internal pressure reaches 1.0atm at 300K. The molar masses are 28gmol−1 for N2 and 20.18gmol−1 for Ne.
Assume ideal‐gas behavior in your analysis.
(a) Calculate the ratio of the root‐mean‐square speeds vrms,N2/vrms,Ne at this temperature.
(b) A small pinhole is opened briefly in the vessel wall. Determine which gas exits the vessel faster and by what factor, explaining your reasoning in terms of molecular motion.