Gas vs. Fluid — What's the Difference?

Highly compressible, allowing for easy storage and transport.

Encompasses both gases and liquids, anything that can flow.

Used in various applications due to its expansive and diffusive properties.

Fluids like liquids have a pressure that increases with depth.

A form of matter that expands to fill any shape or volume of its container.

Finds use in a wide array of systems, from hydraulic to pneumatic.

Exerts pressure evenly across the walls of its container.

Includes both compressible gases and nearly incompressible liquids.

High diffusivity, meaning it can mix and spread out quickly.

Studies both laminar and turbulent flows in fluids.

Gas is one of the four fundamental states of matter (the others being solid, liquid, and plasma).A pure gas may be made up of individual atoms (e.g. a noble gas like neon), elemental molecules made from one type of atom (e.g.

In physics, a fluid is a liquid, gas, or other material that continually deforms (flows) under an applied shear stress, or external force. They have zero shear modulus, or, in simpler terms, are substances which cannot resist any shear force applied to them.

A substance or matter in a state in which it will expand freely to fill the whole of a container, having no fixed shape (unlike a solid) and no fixed volume (unlike a liquid)

A substance that has no fixed shape and yields easily to external pressure; a gas or (especially) a liquid

Short for gasoline

(of a substance) able to flow easily

An entertaining or amusing person or situation

(of a clutch or coupling) using a liquid to transmit power.

Kill or harm by exposure to gas

A continuous, amorphous substance whose molecules move freely past one another and that has the tendency to assume the shape of its container; a liquid or gas.

Talk excessively about trivial matters

Of, relating to, or characteristic of a fluid.

Fill the tank of (a motor vehicle) with petrol

Readily reshaped; pliable.

Very amusing or entertaining

Smooth and flowing; graceful

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.

Changing or tending to change; variable

A substance in the gaseous state.

Characterized by or allowing social mobility

Any of various mixtures of flammable gases used for lighting, heating, or cooking.

Convertible into cash

Gasoline.

Any substance which can flow with relative ease, tends to assume the shape of its container, and obeys Bernoulli's principle; a liquid, gas or plasma.

The speed control of a gasoline engine. Used with the

A liquid as opposed to a solid or gas.

A gaseous asphyxiant, irritant, or poison.

Intravenous fluids.

A gaseous anesthetic, such as nitrous oxide.

(not comparable) Of or relating to fluid.

Flatulence.

In a state of flux; subject to change.

Flatus.

Moving smoothly, or giving the impression of a liquid in motion.

(Slang) Idle or boastful talk.

(of an asset) Convertible into cash.

(Slang) Someone or something exceptionally exciting or entertaining

(rare) Genderfluid.

To treat chemically with gas.

Having particles which easily move and change their relative position without a separation of the mass, and which easily yield to pressure; capable of flowing; liquid or gaseous.

To overcome, disable, or kill with poisonous fumes.

A fluid substance; a body whose particles move easily among themselves.

To give off gas.

A substance that is fluid at room temperature and pressure

(Slang) To talk excessively.

A continuous amorphous substance that tends to flow and to conform to the outline of its container: a liquid or a gas

Matter in an intermediate state between liquid and plasma that can be contained only if it is fully surrounded by a solid (or in a bubble of liquid, or held together by gravitational pull); it can condense into a liquid, or can (rarely) become a solid directly by deposition.

Subject to change; variable;

(uncountable) A flammable gaseous hydrocarbon or hydrocarbon mixture used as a fuel, e.g. for cooking, heating, electricity generation or as a fuel in internal combustion engines in vehicles, especially natural gas.

Characteristic of a fluid; capable of flowing and easily changing shape

Poison gas.

Smooth and unconstrained in movement;

A chemical element or compound in such a state.

In cash or easily convertible to cash;

(countable) A hob on a gas cooker.

Affording change (especially in social status);

(uncountable) Methane or other waste gases trapped in one's belly as a result of the digestive process; flatus.

(slang) A humorous or entertaining event or person.

(slang) Frothy or boastful talk; chatter.

(baseball) A fastball.

Arterial or venous blood gas.

Marijuana, typically of high quality.

, a light derivative of petroleum used as fuel.

Ellipsis of gas pedal

An internal virtual currency used in Ethereum to pay for certain operations, such as blockchain transactions.

(transitive) To attack or kill with poison gas.

To talk in a boastful or vapid way; chatter.

To impose upon by talking boastfully.

(intransitive) To emit gas.

(transitive) To impregnate with gas.

(transitive) To singe, as in a gas flame, so as to remove loose fibers.

(US) To give a vehicle more fuel in order to accelerate it.

(US) To fill (a vehicle's fuel tank) with fuel.

(slang) comical, zany; fun, amusing.

An aëriform fluid; - a term used at first by chemists as synonymous with air, but since restricted to fluids supposed to be permanently elastic, as oxygen, hydrogen, etc., in distinction from vapors, as steam, which become liquid on a reduction of temperature. In present usage, since all of the supposed permanent gases have been liquified by cold and pressure, the term has resumed nearly its original signification, and is applied to any substance in the elastic or aëriform state.

A complex mixture of gases, of which the most important constituents are marsh gas, olefiant gas, and hydrogen, artificially produced by the destructive distillation of gas coal, or sometimes of peat, wood, oil, resin, etc. It gives a brilliant light when burned, and is the common gas used for illuminating purposes.

Same as gasoline; - a shortened form. Also, the accelerator pedal of a motor vehicle; used in the term " step on the gas".

The accelerator pedal of a motor vehicle; used in the term " step on the gas".

Same as natural gas.

An exceptionally enjoyable event; a good time; as, The concert was a gas.

To singe, as in a gas flame, so as to remove loose fibers; as, to gas thread.

To impregnate with gas; as, to gas lime with chlorine in the manufacture of bleaching powder.

To expose to a poisonous or noxious gas

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

A fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely

A volatile flammable mixture of hydrocarbons (hexane and heptane and octane etc.) derived from petroleum; used mainly as a fuel in internal-combustion engines

A state of excessive gas in the alimentary canal

A pedal that controls the throttle valve;

A fossil fuel in the gaseous state; used for cooking and heating homes

Attack with gas; subject to gas fumes;

Show off

A gas is defined by its ability to expand and fill any shape or volume of its container, characterized by its high kinetic energy and the significant spaces between its particles.

Fluid is a term that includes gases and liquids, characterized by their ability to flow. Gases are a subset of fluids, with the key difference being that gases are highly compressible, while liquids (a type of fluid) are not.

Yes, air is considered a fluid because it flows and can conform to the shape of its container, fulfilling the criteria for fluid behavior.

Liquids are considered fluids because they have the ability to flow and take the shape of their container, similar to gases but with significantly less compressibility.

Yes, gases exert pressure uniformly on all surfaces of their container due to the constant, random motion of their particles.

All fluids exert pressure, but how it is applied varies; liquids, specifically, exert pressure that increases with depth due to gravity.

Liquids, due to their incompressibility and ability to exert pressure, are essential in hydraulic systems, where they transmit force to perform work, such as in hydraulic brakes.

Yes, the behavior of gases can often be predicted using the ideal gas law, which relates the pressure, volume, and temperature of a gas.

Fluid dynamics is the study of the behavior of fluids (both gases and liquids) in motion, including the forces and energy involved in such movements.

Gases and liquids differ in flow characteristics; gases can expand and fill a space, whereas liquids flow and take the shape of a container's bottom, often exhibiting different patterns of flow such as laminar or turbulent flow.

Gases are utilized in a variety of applications, including combustion engines, gas turbines, and as refrigerants in cooling systems.

Gases are more compressible than liquids due to the large spaces between their particles, which can be reduced under pressure, unlike liquids which have particles that are already closely packed.

A substance is considered a fluid if it can flow, meaning it can easily change shape under external forces. This includes both gases and liquids.

Not all fluids are liquids; the category of fluids includes both gases, which are compressible and fill their container, and liquids, which are nearly incompressible and flow to take the shape of their container's bottom.

Fluids are crucial in engineering because they are involved in a wide range of systems, from the hydraulic systems that power machinery to the aerodynamics of vehicles and the ventilation systems in buildings.