本题目来源于试卷: Particulate Nature of Matter B.3 Ideal Gas Model，类别为 IB物理学
[单选题]
An ideal gas is in a fixed volume container which sits on an electronic balance. More of the same gas is added to the container. Which of the following will not change?
A. The separation between the gas molecules
B. The collision frequency of the gas molecules with each other
C. The average size of the molecules
D. The reading on the electronic balance
参考答案: C
本题详细解析:
Explanation: Due to the fixed volume, the separation between the gas molecules decreases. According to the ideal gas law, the pressure of the gas will increase and so does the collision frequency. The mass of the container will also be greater with the addition of more gas in the container. The only constant quantity is the average size of the molecules. It is dependent on molecular structure only. Therefore the answer is C.
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