A 0.826 mol sample of O 2 gas is confined in a 19.4 liter container at 13.6 o C.

ID: 539690 • Letter: A

Question

A 0.826 mol sample of O2 gas is confined in a 19.4 liter container at 13.6 oC.

If the temperature of the gas sample is increased to 35.3 oC, holding the volume constant, the pressure will increase because:

Choose all that apply.

A. At higher temperatures molecules have higher average speeds. B. As the average speed increases, the number of molecule-wall collisions decreases. C. With lower average speeds, the molecules hit the walls of the container less often. D. With higher average speeds, on average the molecules hit the walls of the container with more force. E. None of the Above

Explanation / Answer

Kinetic molecular Theory says average kinetic energy of the particle depends on temperature .if temperature is increased kinetic energy also increases.since k.e=1/2 *m*v^2 .since mass is constant only velocity should increase.with increase in velocity the molecules give more impact to walls or exert more force resulting in increased pressure so option D

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A 0.826 mol sample of O 2 gas is confined in a 19.4 liter container at 13.6 o C.

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