Question

if a gas is forced into a small space what happens to the pressure

Answer 1

Compressing Gases. Gases hold huge amounts of energy and their molecules are spread out as much as possible. ... You might have compressed air in a spray bottle or feel the carbon dioxide rush out of a can of soda. Those are both examples of gas forced into a smaller space at greater pressure.

Answer 2

obviously, the air pressure will increase, because large amount of air is concentrated inside a small space.