Question #b70ed

1 Answer
Jun 14, 2017

Yes, solid can diffuse into solid.


The particles in solids have thermal kinetic energy, which causes them to vibrate and eventually diffuse into each other.

However, the process is very slow, because the particles in a solid are closely packed dogether.

Some examples of solid-solid diffusion are

  • Pure gold and pure lead will diffuse into each other.

  • Chalk marks on a blackboard eventually become permanent.

  • Two pieces of chalk wrapped tightly together will fuse together after a few years.