If a bottle of perfume was spilled in the corner of a large lecture hall, the students sitting near that corner of the room would very quickly smell the perfume. Over time, the students sitting in the far corner of the room would smell the perfume. What phenomenon has occurred to the perfume molecules that have entered the air?

Simple Diffusion

Explanation:

Simple diffusion is the physical process by which substances move from a region where they are highly concentrated to areas where the concentration of that substance is lower. Simple diffusion is a spontaneous process that does not require energy, but is promoted by a concentration gradient.

The substances that are dissolved are called solutes, they move through a solution (or a gas) by random movements. Random motion is defined as the motion that occurs by chance, where there is no regular order or system by which the motions of the particles change in a solution or gas.

Simple diffusion

Explanation:

Simple diffusion is basically the diffusion of substances through a membrane without needing the help from other substances, from the area of higher concentration to the area of lower concentration.Also known as passive diffusion.

Simple diffusion does not require energy. Instead, it happens by random motion. Random motion is defined as movement that occurs by chance because there is no order or regular system by which the movements of the particles shift in a solution or gas.

Therefore the smell of perfume spilled at the corner of a large hall spreads to all other corners by simple diffusion.

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if you're asking what comes out, it's steam.