Why does pressure increase when volume decreases?

Answer 1

Because when you decrease the volume the gas, substance or what ever you have, gets more compressed and tries to get out of the container by pushing the lid, Weight, Cap or what ever is blocking it out of the way to try and get out

Answer 2

As the volume is decreased, the same number of molecules of air have a smaller space to move freely in. The number of collisions of molecules of air with the walls of the container per unit time increases. Since pressure is the force exerted over an area, the pressure increases.

Answer 3

The process of reducing volume is usually referred to as compression. To get more substance into a smaller space you have to shove the molecules together against their existing pressure, thus giving a higher pressure than when you started.

Answer 4

To contain the same amount of material in a smaller volume you must push the molecules of the material in the container closer together so they will fit in the smaller volume. That is, by definition, an increase in pressure.

This relationship is part of the gas laws. Temperature is included as well. The relationship of these three (Pressure, Temperature and Volume) variables is:

(P1V1)/T1 = (P2V2)/T2

Answer 5

Boyles Law. P1 x V1 = P2 X V2

When volume is decreased, the gas has less space to expand; thus, causing the pressure to increase as it it confined.

Answer 6

The pressure is low, the volume increases.

Answer 7

in gases the pressure is created by collisions of gas particles. if there is less volume for them to move around in, there will be more collisions, so increased pressure.