Ideal Gas

A theoretical material used in physics and chemistry to describe the behaviors of gases under different conditions. In an ideal gas:

  • All collisions between molecules are perfectly elastic (i.e. no energy is lost when individual molecules collide).
  • Molecules remain in the gas phase all the way down to absolute zero.
  • The molecules themselves have no mass or volume.
  • Ideal gases don’t exist, but describing ideal gases is useful because the behavior of real gases are similar to ideal gases in many real world situations.

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