Which is an assumption of the kinetic-molecular theory?I. Matter is composed of tiny particles.II. The particles of matter are in continual moton.III. The total kinetic energy of colliding particles remains constant.A.I onlyB.II and III onlyC.I, II, and IIID.I and II only
Question
Which is an assumption of the kinetic-molecular theory?I. Matter is composed of tiny particles.II. The particles of matter are in continual moton.III. The total kinetic energy of colliding particles remains constant.A.I onlyB.II and III onlyC.I, II, and IIID.I and II only
Solution
The kinetic-molecular theory makes several assumptions about the nature of gases. These include:
I. Matter is composed of tiny particles. This is a basic assumption of the theory, as it posits that gases are made up of a large number of very small particles, each of which are in constant, random motion.
II. The particles of matter are in continual motion. This is another fundamental assumption of the theory. The constant motion of these particles results in collisions that cause gas pressure.
III. The total kinetic energy of colliding particles remains constant. This is also an assumption of the kinetic-molecular theory. It assumes that the total energy in a system of gas particles is conserved, meaning it remains constant unless energy is added or removed.
Therefore, the correct answer is C. I, II, and III. All three statements are assumptions of the kinetic-molecular theory.
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