No, a gas can fill the space of any container
A gas has no fixed volume or shape.
Gas
a gas
A gas is a substance with no definite shape or volume.
A Gas has neither a fixed Volume or Shape.
a gas
A gas
Solid: Particles are tightly packed together, have a fixed shape and volume, and vibrate in place. Liquid: Particles are close together but can flow and take the shape of their container, with a fixed volume. Gas: Particles are far apart, move freely, have no fixed shape or volume, and fill the entire container they are in.
The matter that can change shape and volume is gas.
A solid has a fixed volume and shape. Like a bar of soap. A liquid has a fixed volume, but no fixed shape, like water. A gas has no fixed volume and no fixed shape. Like a burp. If you pour mouthwash into a glass, it still has volume, but now it takes on the shape of the glass. Hmmm. Sounds mighty liquidy, does it not?
A gas is something without a fixed shape or volume because its particles are widely spread out and move freely.
Gas will take the shape of whatever container it is in. One of the characteristics of a gas is that it has no definite shape or volume.