Which of the following samples will have the greatest average speed at 355 K? A) Kr B) C₂H₄ C) Cl₂ D) CH₄ E) All of these samples will have the same average speed at the same temperature.

Question

Quizplus · Accepted Answer

The average speed of a gas particle is proportional to the square root of the temperature and inversely proportional to its molar mass. Out of the given samples, CH₄ has the lowest molar mass and thus will have the highest average speed.

Which of the Following Samples Will Have the Greatest Average