Question

Motion of particles?


Hallo everyone!

I'd like to ask...

When particles are in motion forming heat is this formal model W= Fd applied?
I know that "Heat" is form of energy...

I like to breaking down things... When we break down heat its the motion of particles, ok. Then are those particles doing work? Are they applying a force on a distance?

Just curious...
Thanks in advance!

Hope,

Answer 1

You've got the right idea. Atoms in a solid (or liquid or gas or what have you) are not stationary -- they're constantly jiggling around due to their thermal kinetic energy. When they interact with each other, they exert electrical forces on each other, and indeed do work, transferring energy from one particle to another. However, the randomness of thermal vibrations ensures that in an equilibrium situation, all of the atoms that make up a particular system will be vibrating with exactly the same kinetic energy (always flowing from one atom to another but it averages out to be the same). This means that equilibrium systems are at a constant temperature.

Answer 2

Thanks @Jemurray3 !