Question

NO LINKS PLEASE! Why does dye dropped into a cup of water eventually spread throughout the water?

Answer 1

Answer:

C

Explanation:

okay, you need to look at the structures of the particles of matter in the solid, liquid and gas.

• particles in a solid are in fixed positions, where they can only vibrate in those positions ( take a look at ice, or rather, a brick)
• liquids have very small or rather, no spaces between them, but they can slide or rub against each other, like people in a really tight crowd I guess
• gas particles have very large spaces between them and they move randomly. these exibit what's called brownian motion.

• since water particles (and all other liquid particles) have negligible spacings and limited movement, that allows the dye particles to move from a region of high concentration to that of a low concentration. the aim for this is for the mixture/solution to reach an equilibrium, that  is the mixture must get to a point where all regions have the same concentration of the dye.

you can refer to your coursebooks :)

correct where wrong please:)