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Which sample would have particles moving the most rapidly?

1) ice at -20 °C

2) water at 20 °C

3)steam at 110 °C

4) boiling water

5) ice at 0 °C

2 Answers

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  • 9 months ago
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    Speed of molecules .....

    From the kinetic molecular theory, we have "... all molecules are in constant random motion, and the average (rms) speed of the molecules is directly proportional to the absolute temperature."

    Therefore, find the highest temperature.

    Yep, that would be (C).

    Although (D) is ambiguous since there is no mention of the temperature or the pressure. At elevated pressures, the boiling point of water is substantially greater than 100C which is the boiling point at 1.00 atm. So boiling water in a pressurized nuclear reactor, for instance, will be much hotter than boiling water at 1 atm, and the molecules would be moving faster than the steam molecules at 110C.

  • 9 months ago

    Organic chem, are you kidding me? This is a question for junior high school, and the answer is steam at 110C.

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