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The density of a substance equals its mass divided by volume. If the volume decreases (such as by compressing a gas), its density will increase.

Gas can be compressed so much that it turns into a liquid form.

Compressed elemental gas (as in Hydrogen, Oxygen, etc) will however not remain in this state when pressure is released. It will simly turn back into gas again.

Some gasses that are a mix of various components may even change structure due to high pressure and temperature. Some gasses can be turned into plastic. Commonly done with natural gas from "oil" wells.

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14y ago
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12y ago

Density= mass/volume

if the volume is decreased, the density will decrease as well.

Also consider the Ideal Gas Law:

PV=nRT

P = pressure

V = volume

n = number of moles of gas

R = gas constant (Google that, it depends on the actual raw data)

T = temperature

When you compress the gas, n, R, and T stay the same. When you increase the pressure, the volume must decrease (a gas law) so the volume must decrease in order to balance out the equation and maintain equilibrium.

tl;dr? answer is YES :)

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13y ago

Air density changes as more air is put into a limited space. It gets higher.

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12y ago

No, compression does not affect the number of moles.

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Q: Is the density of a gas decreased as it is compressed?
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How is pressure affected when a gas is compressed?

When a gas is compressed, so volume is decreased, the pressure increases. P=1/V


If chlorine gas is compressed does its density increase?

Yes It does increase. http://webbook.nist.gov/chemistry/fluid/ While this website doesn't include chlorine, any gas that is compressed will increase in density. Different gasses all have different compression-density relationships, but all gasses that are compressed will increase in density.


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Depends on the density of the gas.


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The increase in pressure signifies the increase in the number of collisions of the gas atoms with its container, this can result from 2 factors (when temperature is constant): either there is gas added, or the volume of the container has been decreased. Thus the Density, which is mass (which can be equated to amount of gas) divided by volume, and increase in mass or decrease in volume will effectively increase the density of the gas.


Why does the volume of a gas decrease when pressure increases?

As pressure increases, the molecules of the gas are compressed, reducing the amount of space between molecules, which results in a decreased volume.


What happens the density of a gas as it is compressed?

The atoms or molecules of a gas will increase in thermal energy when the gas is compressed. The kinetic energy of those atoms or molecules will increase as they are forced closer together in compression, and the temperature of the gas will increase.


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Why does gas have a lower density than a solid?

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If the temperature of a gas in a movable piston is decreased what will happen to the density of the gas?

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