关键词: 气体分子, 平均速率, 实验

Abstract: The mean speed of gas molecules is measured with a simple method at the room temperature.By using the momentum conservation of the variable mass object,the volatile characteristic of the volatile liquid and the reaction force of gas molecules are analyzed,the quality change of the volatile liquid is measured with the analytical balance,and the mean velocity of gas molecules is achieved.The experimental result is in good agreement with the theoretical value.

Key words: gas molecules, mean velocity, experiment