Each of three identical 15.0-L gas cylinders contains 7.50 mol of gas at 295 K.Cylinder A contains Ne,cylinder B contains F₂,and cylinder C contains Cl₂.According to the kinetic molecular theory,which gas has the highest average speed? A)Ne B)F₂ C)Cl₂ D)All have identical average speeds

Question

Quizplus · Accepted Answer

According to the kinetic molecular theory, the average speed of a gas is directly proportional to the square root of its temperature and inversely proportional to the square root of its molar mass. Since all three cylinders are at the same temperature and pressure, the gas with the lowest molar mass will have the highest average speed. Ne has the lowest molar mass of the three gases, followed by F₂ and Cl₂, so Ne will have the highest average speed. Therefore, choice A is the best answer.

Each of Three Identical 15