(or 10): How does a vacuum work? Why does gaseous matter feel pressured (pardon pun) to occupy as much space in a vacuum as possible?

Question

Reading The Martian and thinking about things like depressurisation – why does air from a higher concentration feel the need to rush through a small leak with enough force to rip or blow things apart instead of staying put?

What calls it from the vacuum for it to be so obsessed in doing so?

In: Planetary Science

Answer 1

Molecules bounce off each other. Put a cluster of vibrating marbles in a box and imagine what happens.