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Which statement describes the particles of an ideal gas, based on the kinetic molecular theory?

January 2020 Regents Chemistry Exam


12 Which statement describes the particles of an ideal gas, based on the kinetic molecular theory?

(1) There are attractive forces between the particles.

(2) The particles move in circular paths.

(3) The collisions between the particles reduce the total energy of the gas.

(4) The volume of the gas particles is negligible compared with the total volume of the gas.


Solution: Kinetic molecular theory has the following statements which need to be memorized:

  1. Gas particles have negligible volume.

  2. Gas particles are in continuous random motion and move in straight lines.

  3. No forces of attraction or repulsion are considered to exist between the particles.

  4. Collisions of gas particles may transfer energy from one particle to another, but the total kinetic energy remains the same.

Answer: 4


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