Gases do not have a definite shape or volume because
the molecules in gases are very loosely packed
, they have large intermolecular spaces and hence they move around. The force of attraction between molecules is also very less, as a result gases acquire any shape or any volume.
Why don t gases have a definite shape or volume?
Gases don’t have a fixed shape or a fixed volume.
The particles move around all the time and spread out
. This is why a gas fills its container. A gas can be compressed into a very small space – this pushes the particles closer together.
Does a gas have a definite shape and volume?
A gas has neither a definite shape nor a definite volume
. Like liquids, gases are fluids. The particles in a gas can move around one another freely.
Why do gases have no set volume?
Gas is a state of matter that has no fixed shape and no fixed volume. … When more gas particles enter a container, there is less
space
for the particles to spread out, and they become compressed. The particles exert more force on the interior volume of the container. This force is called pressure.
How will you show that a gas does not have a definite volume?
Like liquids, gases have
no
definite shape, but unlike solids and liquids, gases have no definite volume either. The change from solid to liquid usually does not significantly change the volume of a substance. … Gases have the following characteristics: No definite shape (takes the shape of its container)
Has definite volume and can flow?
solid
: Has a definite shape and volume. liquid: Has a definite volume, but take the shape of the container. gas: Has no definite shape or volume. change of state: When matter is converted from one of the three states (example: solid, liquid, or gas) to another state.
What has definite volume but no definite shape?
A solid has definite volume and shape, a
liquid
has a definite volume but no definite shape, and a gas has neither a definite volume nor shape.
What is a definite volume?
Definite (for both shape and volume) means
that the container makes no difference whatsoever
. If 5-liters of liquid water is poured into a 10-liter container, the liquid would occupy 5-liters of the container and the other 5-liters would be empty.
Does a gas have a definite mass?
Solids are the ones who have rigid structure and which have a definite volume and shape. … – Therefore, gases take the shape of the container and occupy the complete volume of that particular container. – Thus, the correct answer to this question is that
gases have definite mass but no definite volume and shape
.
Why solid have a definite volume?
(a) Solids have definite shape and definite volume
because the molecules in solid are closely packed and in fixed positions
. The molecules can vibrate but do not move around which keeps the shape and volume definite.
What happens when gas is cooled?
If a gas is cooled,
its particles will eventually stop moving about so fast and form a liquid
. This is called condensation and occurs at the same temperature as boiling. … Evaporation is dependent on individual particles gaining enough energy to escape the surface of the liquid and become gas particles.
What are the 4 properties of gas?
Because most gases are difficult to observe directly, they are described through the use of four physical properties or macroscopic characteristics:
pressure, volume, number of particles
(chemists group them by moles) and temperature.
What happens when gas expands?
As the volume of a gas expands,
the overall temperature tends to drop because there are fewer molecules per any given volume
. According to the ideal gas law PV=nRT, P=(n/V) RT, the pressure can be constant with decreasing molecular density only with increasing temperature.
Which state of matter has zero Diffusibility?
| List I List II | 1. Have no definite shape, volume or free surface A. Solids only | 2. Are highly compressible and less rigid B. Liquids only | 3. Have a definite volume, no definite shape and are slightly diffusible C. Gases only | 4. Are not compressible and have no diffusibility D. Liquids and gases only |
|---|
Is a liquid’s volume fixed?
Liquid:
Liquids maintain a fixed volume
, but their shape will mold to the shape of the container they are being held in. A liquid maintains a fixed volume, but its shape will mold to the shape of the container it is being held in.
What is the Behaviour of gas?
Gas particles
move in random, straight-line motion
. Gas particles possess a greater kinetic energy than the particles of a liquid or solid. The greater kinetic energy is due to gases existing at higher temperatures than liquids or solids.
