Question

what is brownian motion and diffusion and sublimation ​

Answer 1

Explanation:

Brownian motion is the stochastic motion of particles induced by random collisions with molecules (Chandrasekhar, 1943) and becomes relevant only for certain conditions.

Diffusion is the movement of a substance from an area of high concentration to an area of low concentration. Diffusion happens in liquids and gases because their particles move randomly from place to place. Diffusion is an important process for living things; it is how substances move in and out of cells.

Sublimation is a type of phase transition, or a change in a state of matter, just like melting, freezing, and evaporation. Through sublimation, a substance changes from a solid to a gas without ever passing through a liquid phase. Dry ice, solid CO2, provides a common example of sublimation.

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Answer 2

Answer:

Here's your answer...........

Explanation:

Brownian motion :– It's the movement of microscopic particles suspended in a liquid or gas, caused by collisions between these particles and the molecules of liquid or gas.

Eg : The movement of pollen grains on still water.

Diffusion :– It's a physical process that refers to the net movement of molecules from a region of high concentration to one of lower concentration. The material that diffuses could be a solid, liquid or gas.

Eg : when perfume is sprayed in one part of a room, yet soon it diffuses so that you can smell it everywhere.

Sublimation :– It's a chemical process where a solid turns into a gas without going through a liquid stage.

Eg : when ice cubes shrink in the freezer.