Definition

Noun: The physical condition of a substance that is neither solid nor liquid, characterized by particles that are far apart, move freely and rapidly, and have no fixed shape or volume, instead expanding to fill any container.

Usage

The term "gaseous state" is used in scientific and technical contexts to describe matter in its gas form. It refers to the condition or phase itself. * Water turns from a liquid to a gaseous state when it boils, becoming steam. * Nitrogen is commonly stored in a gaseous state at room temperature. * To study its properties, the element must be maintained in a pure gaseous state.

Advanced Usage

• "To be in a gaseous state": This is the standard phrase to indicate that a substance currently exists as a gas.
  • At standard atmospheric pressure, oxygen is in a gaseous state.

Variants and Related Words

• Gas (n): The more common term for a substance in the gaseous state.
  • Helium is a noble gas.
• Gaseous (adj): Describing something that has the properties of a gas.
  • The planet has a thick, gaseous atmosphere.
• Vapor (n): Often used for the gaseous state of a substance that is normally a liquid or solid at room temperature.
  • Water vapor is invisible.

Synonyms

• Gas phase
• Vapor state (when referring to a substance below its critical point)

Related Scientific Concepts

• State of matter: The distinct forms that different phases of matter take on (solid, liquid, gas, plasma).
• Phase transition: The transformation from one state of matter to another, such as evaporation (liquid to gaseous state).
• Fluid: A substance that flows; both liquids and gases (the gaseous state) are fluids.

Noun

1. the state of matter distinguished from the solid and liquid states by: relatively low density and viscosity; relatively great expansion and contraction with changes in pressure and temperature; the ability to diffuse readily; and the spontaneous tendency to become distributed uniformly throughout any container