In physics, a gas is a state of matter characterized by particles that are widely spaced and have high kinetic energy. Gas molecules move freely, colliding with each other and their container walls.

They take the shape of their container, and properties like pressure, temperature, and volume describe their behavior.

Characteristics Of Gases

  • No Fixed Shape: Fills the container it occupies evenly.
  • Expands Easily: Occupies the entire available volume.
  • Low Density: Particles are widely spaced and move freely.
  • Compressible: Easily compressed into smaller volumes.
  • Rapid Diffusion: Particles mix and spread quickly.
  • No Fixed Volume: Takes the shape of the container.
  • Exerts Pressure: Due to particle collisions with container walls.
  • High Kinetic Energy: Particles have significant motion and energy.
  • No Attractive Forces: Weak intermolecular forces between particles.
  • Turns into Liquid or Solid: Under reduced temperature or pressure.