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 Measuring Gas... Simple?
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kcarring
Moderator


Canada
1057 Posts

Posted - December 01 2012 :  17:02:40  Show Profile Send kcarring a Private Message  Reply with Quote
Here is an interesting bit of info:

A Normal Cubic Meter of a gas (Nm3) is the volume of that gas measured under the standard conditions of 0 degrees Celsius, and 1 atmosphere of pressure. Specifying the "Normal" conditions of measurement must be done with gases, since the volume of a gas is inversely proportional to its pressure, and proportional to absolute temperature. In other words, because gas volume changes so dramatically with temperature and pressure, we have to establish some "normal" or "known" temperature and pressure conditions in order to be able to compare one person's measurement with another.

Liquids are also universally measured in cubic meters, but not "Normal" cubic meters, since liquids are not subject to the dramatic changes in volume that gases are when temperature and pressure are changed.

It is not only possible to measure a liquid volume using cubic meters, (or the unit called "Liters" that is 1/1000th of a cubic meter) nearly everyone in the world uses this as an everyday measure of liquid volume, just as in the US, quarts, gallons, cubic feet, cubic inches, and fluid ounces are somewhat confusingly used for the same thing.

Can liquid gases be measured in *Normal* Cubic Meters, is no. The reason is simply that it is required to do the "Normal" measurement at 0 degrees Celsius, and as you no doubt know, any normal liquefied gas (such as liquid argon) is no longer a liquid at this high temperature. It would not be possible to measure its volume since it would have all boiled away already.

~~~~~~~~~~~~~
You wouldn't laugh at my igloo if you knew how cold my beer is!

Edited by - kcarring on December 01 2012 17:04:17

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TinMan
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4082 Posts

Posted - December 01 2012 :  19:52:25  Show Profile Send TinMan a Private Message  Reply with Quote
Here is some useful information reguarding LPG-propane,butane,ethane and methane
You must be logged in to see this link.

swim at 90 degrees to the current and gain speed in two directions

skype-thetinman.69
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ron_o
Moderator



United Kingdom
1052 Posts

Posted - December 06 2012 :  18:31:43  Show Profile Send ron_o a Private Message  Reply with Quote
One mole of gas will occupy approx 22.4 litres of volume at STP . therefore if you know the weight of gas per mole you can calculate the volume i.e weight of liquified gas x 22.4 / mole weight of gas

ron
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