Question

use particle theory to explain why liquids and gases can flow?​

Answer 1

Answer:

Particles are still touching and held very by strong forces of attraction. ... Because the particles can move, liquids don't have a definite shape, and they can flow. Because the particles are still packed close together, liquids can't easily be compressed and keep the same volume.

Explanation:

Matter exists in four different forms - solid, liquid, gas, and plasma. These are the four states of matter. You can recognize each state because they have different properties. A property of a material describes how it behaves. This behavior is not observable at the chemical level due to microscopic sized particles. We can observe how many H2O particles behave when we open a faucet, releasing water, which is a lot of H2O particles in their liquid state. Of course we can observe other states of H2O particle groupings, at low temperatures they freeze, demonstrating a solid property. At high temperatures they form a gas called steam. Behavior is how something responds when placed in a container, when it is squeezed, or released.

Answer 2

Answer:

(a) The molecules of liquids and gases are far apart i.e. have more gaps, intermolecular attraction force is very less as compared to solids, hence liquids and gases can flow but solids do not as gaps*in solid molecules is less and molecular force of attraction very strong.

(b) Intermolecular force of attraction is least and intermolecular spaces are very large, hence gases can fill up the space available to them.

(c) Scent fumes (molecules) being gases fill the spaces between air molecules and the molecules of air fill the spaces between scent molecules due to diffusion, fumes spread into a room.

OR

Due to inter-mixing of scent molecules and air molecules, scent fumes spread into the room.

(d) The molecules of air are far apart i.e. large gaps and we can walk through air easily.

(e) The molecules of liquid are loosely packed and intermolecular force of attraction is small but number of molecules in it remain the same. Hence liquids have definite volume but no definite shape.

(f) When a teaspoon of sugar is added to half a glass of water and stirred, the water level in the glass remains unchanged because the sugar particles are adjusted between the water molecules as inter-molecular gaps are more in liquids.

(g) This is because Gases can diffuse or flow in all directions.

(h) When we put a drop of red ink in a glass of water, its particles diffuse with particles of water slowly but continuously and the water turns red.