The pressure of a gas is measured in an experiment. The measured pressure is les

Question

The pressure of a gas is measured in an experiment. The measured pressure is less than the pressure predicted by the ideal gas law. Which of the assumptions of the kinetic molecular theory are NOT valid under these conditions?

Choose one: A. The motion of these molecules is associated with the average kinetic energy that is proportional to the absolute temperature of the gas.

B. Gas molecules have tiny volumes compared to the collective volume they occupy.

C. Each gas molecule acts independently of all other molecules in a sample.

Explanation / Answer

the assumption C is not valid as the gas molecules have interaction between them so the expected pressure decreases due to interaction betwwen the molecules . hence , the measured pressure is less than the predicted pressure .

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