Describe PE of Particles in a Gas

In summary, potential energy (PE) is the energy stored in a molecule's position due to intermolecular forces. This is evident in processes like evaporation, where energy is required to separate molecules and increase their internal potential energy. This energy is returned when the molecules condense, and if there are no intermolecular forces, there would be no potential energy.
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Jewish_Vulcan
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I understand why there is KE in the particles of a gas but I cannot really visualize the where the PE is coming from.. please straight forward answers!
 
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PE would be energy by virtue of a molecule's position with respect to other molecules due to intermolecular forces. For example, it takes energy to separate water molecules from each other so they don't stick together - evaporation. That process does not result in an increase of kinetic energy (temperature). But it does require energy, so it increases the internal potential energy of the molecules. That potential energy is returned when the vapour condenses. If there are no intermolecular forces, there would be no PE.

AM
 
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Andrew Mason said:
PE would be energy by virtue of a molecule's position with respect to other molecules due to intermolecular forces. For example, it takes energy to separate water molecules from each other so they don't stick together - evaporation. That process does not result in an increase of kinetic energy (temperature). But it does require energy, so it increases the internal potential energy of the molecules. That potential energy is returned when the vapour condenses. If there are no intermolecular forces, there would be no PE.

AM
Thank you! very logical answer.
 

Related to Describe PE of Particles in a Gas

1. What is the physical explanation of particles in a gas?

The physical explanation of particles in a gas is that they are constantly in random motion, colliding with each other and the walls of their container. This motion is caused by the high energy and kinetic energy of the particles.

2. How do the properties of particles in a gas affect its behavior?

The properties of particles, such as mass, speed, and size, directly affect the behavior of a gas. For example, particles with a higher mass will move slower and collide less frequently, leading to a decrease in pressure.

3. What is the relationship between temperature and the kinetic energy of particles in a gas?

As temperature increases, so does the kinetic energy of particles in a gas. This is because an increase in temperature means an increase in the average speed of the particles, leading to more frequent and energetic collisions.

4. How does the volume of a gas container affect the behavior of particles within it?

The volume of a gas container is directly related to the movement of particles within it. A larger volume means more space for the particles to move around, resulting in a decrease in pressure. On the other hand, a smaller volume will cause the particles to collide more frequently, leading to an increase in pressure.

5. How is the pressure of a gas related to the number of particles present?

The pressure of a gas is directly proportional to the number of particles present. This means that as the number of particles increases, so does the pressure. This is because there are more particles colliding with the walls of the container, exerting more force and increasing the pressure.

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