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The particles in which sample of LiCl(s) have the same average kinetic energy as the particles in a 2.0-mole sample of H2O(l) at 25°C?

(1) 1.0 mol at 75°C

(2) 2.0 mol at 50.°C

(3) 3.0 mol at 25°C

(4) 4.0 mol at 0°C

Verified Answer :

pmills3

3; average kinetic energy is just a fancy way of saying temperature. The average kinetic energy of a gas has nothing to do with the molar amount.

Answer;

-3.0 mole at 25 °C


Explanation;

-Temperature is a measure of average kinetic energy. If the samples are at the same temperature, they have the same average kinetic energy.

-Kinetic energy is related to the temperature (temperature is a measure of kinetic energy). Therefore; the higher the temperature the more kinetic energy. Because water is at 25 Celsius then the LiCl would have to be at 25 Celsius to have the same kinetic energy.

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