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James P. Hollen
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Liquid with the Lowest Specific Gravity?

05/16/2007 2:12 AM

Can anyone name a liquid with the lowest specific gravity? (We all know that alcohol is "lighter" than water per unit volume) COMMENT

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Anonymous Poster
#1

Re: lowest specific gravity

05/16/2007 3:08 AM

http://www.simetric.co.uk/si_liquids.htm
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Anonymous Poster
#2

Re: lowest specific gravity

05/16/2007 3:09 AM

Alcohol is also fully miscible with water. Tonic water, perhaps (hic)?
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steve45
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#3

Re: Liquid with the Lowest Specific Gravity?

05/16/2007 11:12 PM

Of course it would depend on the temperature & pressure...
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Jakey Jake
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#4

Re: Liquid with the Lowest Specific Gravity?

05/17/2007 1:33 AM

HHMMmmm. One of the "Anes"...Butane, Propane, Methane? Your guess is as good as mine?

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aurizon
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#6
In reply to #4

Re: Liquid with the Lowest Specific Gravity?

05/17/2007 3:55 PM

water is 62.4 lbs/cubic foot, liquid helium = 7.8 lbs/ft3 lots less.

http://www-safety.deas.harvard.edu/services/helium.html

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Cardio07
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#5

Re: Liquid with the Lowest Specific Gravity?

05/17/2007 9:40 AM

I'm not sure what you want the info for, but if it's just theoretical usage:

Liquid helium has a density of 0.12491 g/cc or 7.798 pounds per cu ft.

Liquid hydrogen has a density of 0.07 g/cc or 4.36996 pounds/cu ft.

The low density of liquid hydrogen is a major problem in using liquid hydrogen as a rocket fuel, the fuel tank has to be so large to carry much mass.
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