Regents Chemistry Exam June 2024 Question 20
20 Which statement describes the particles of an ideal gas, based on the kinetic molecular theory?
(1) The particles have attractive forces between them.
(2) The particles move in random, constant, straight-line motion.
(3) The particles collide, increasing the total energy of the system.
(4) The particles are separated by distances that are small compared to their size.
Solution:
According to kinetic molecular theory,
Gas particles have negligible volume.
The gas particles are in continuous random motion and move in straight lines.
No forces of attraction or repulsion are considered to exist between the particles.
Collisions of gas particles may transfer energy from one particle to another, but the total kinetic energy remains the same.
Choice 2 is the correct answer choice.
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