Increased pressure causes the gas molecules to come closer together, thus the volume also decreases.
Think of a balloon. Let some air out and the pressure goes down, and the balloon decreases in size.
I think you meant what happens to the gas particles when the temperature decreases. If the volume of gas is constant(eg in a fixed container), the pressure of the gas will decrease. If the gas is in a container with a variable volume(eg. balloon), the volume of gas will decrease.
You think probable to compression.
Volume will increase. Think of it this way. If you heat a gas, it gets hotter. When a gas gets hotter, the atoms/molecules are "more active" and the pressure and/or the volume will go up. If your experiment with heating this gas sample must have a constant pressure, then volume will have to increase to give all those "more active" atoms/molecules more play room to prevent the pressure from going up.
When the temperature of a gas is increased at a constant pressure, its volume increases. When the temperature of a gas is devreased at constnt pressure, its volume decreases.
Probable you think to sweating.
No, the relationship between pressure and volume is described by Boyle's Law, which states that pressure and volume are inversely proportional at constant temperature. In this case, as the pressure decreases from 100 kPa to 50 kPa, the volume should double according to Boyle's Law, resulting in a volume of 30L, not 120L.
Well I think that the answer is force and area. <3
At high pressure the gas become a liquid.
The volume of a gas will decrease.Let's think of some good examples. How about an air tank? Its volume is very small but the gas it contains could easily fill a small room. How is the volume so small, then? Because the gas is under extremely high pressure.Okay so intuition from every day life tells us increase in pressure means decrease in volume.Examples of temperature? A hot air balloon is filled by a flame that heats the gas inside it. The balloon gets bigger - the volume rises. This is an especially relevant example since the hot air balloon rises due to buoyancy, meaning the air inside it is less dense than the air outside it.Less dense means there is less mass per volume inside it, so again we know that the gas inside the balloon has undergone an increase in volume in response to being heated.So increase of temperature means an increase of volume.The answer to your question, then, is that the volume will decrease (which is actually kinda difficult to do sometimes...but still a theoretical fact).For further reading and understanding, see "Ideal gas law".
When any gas (or gas mixture), including air, is cooled, the molecules will move slower and they will be able to be closer together. The volume needed to store a certain amount of gas will be less. If you cool it enough, it will eventually turn into a liquid.
I think you are hearing pressure pops. Not a backfire.