Which of the following properties is characteristic of ideal gases?

In the context of ideal gases, one of the defining properties is that collisions between gas particles are perfectly elastic. This means that when gas molecules collide with each other or with the walls of their container, there is no loss of kinetic energy in the collision process. Instead, energy is conserved; the total kinetic energy of the colliding particles remains the same before and after the collision. This characteristic is a key assumption in the kinetic molecular theory of gases, which describes the behavior of an ideal gas.

In contrast, ideal gases are considered to have no appreciable intermolecular forces (which negates attractive forces between molecules) and the volume occupied by the gas molecules themselves (the actual substance) is negligible compared to the volume of the container. This means that the ideal gas model simplifies calculations by treating gas particles as point masses without volume. Additionally, in an ideal gas, the particles are free to move around and are not in fixed positions, further emphasizing the fluid and dynamic nature of gases rather than being confined to fixed locations as solids or liquids are.