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No, Acetylene is heavier than air. In fact for this reason most countries do not allow its use for welding in confined spaces.
Because in the past, leaking acetylene cylinders have filled up the bottom of the area to be welded, with explosive results.
Actually it is slightly lighter than air. Air is roughly 79% Nitrogen and 21% Oxygen. Both Oxygen and Nitrogen exist naturally as homo-nuclear diatomics N2 and O2. Nitrogen has a molecular weight of 28.0 amu(Atomic Mass unit). (14.0 amu x2) Oxygen has a molecular weight of 32.0 amu. (16.0 amu x2)
28.0 amu x0.79 + 32.0 amu x0.21 = 29.0 amu
the effective average molecular weight of air is 29.0 amu
Acetylene has a molecular weight of 26.0 amu.
[Acetylene=HC2H, C=12.0 amu, H=1.01 amu, (12.0 amu x2+1.01 amu x2=26.0 amu)]
26.0 amu < 29.0 amu thus acetylene is roughly 10% lighter than air.
Wiki User
∙ 13y ago
Clay White
The answer here us WRONG!
All references by companies that produce actelyene say the specific gravity is .9. Lighter that air. It rises. I does not fall
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Why do some trace metals require nitrous oxide acetylene flame instead of air acetylene flame?
Nitrous oxide acetylene burns at a higher temperature than air acetylene. You'd really need to ask a metallurgist (someone who know just about everything to do with metals) to get the real answer, but basically some metals are harder than others. The harder the metal, the harder it is to cut with fire. Brass and gold are very soft, while iron and titanium are hard.
Is amonia lighter than air?
Depends on the temperature.
Are organic vapors heavier or lighter than air?
It depends on the specific compound, though most are denser than air.
Can magnesium float or is it lighter than air?
No, unless shaped as a boat, and no.
What happens because water vapor molecules are lighter than nitrogen or oxygen molecules?
humid air is lighter that an equal volume of dry air at the same temperature.
What are lighter than air gases?
All of these 14 gases and no others are lighter than air at the same temperature and pressure. Neon Hydrogen fluoride Water (steam) Carbon monoxide Ammonia Nitrogen Hydrogen cyanide Methane Ethylene Acetylene Methllithium Diborane Helium Hydrogen
Why was the airplane harder to invent than the hot air balloon?
The balloon is lighter than air.
What percentage of hydrogen is lighter than air?
100% of hydrogen is lighter than air
Is methane lighter than air?
Yes methane is lighter than air because it is less dense than air.
Is argon lighter than air?
No Argon is not lighter than air. Argon is 25% more dense than air.
What are some lighter than air aircrafts?
blimp or hot air balloons are lighter than air crafts
When balloons are filled with this they are lighter than air.?
Hot air, hydrogen or helium are lighter than cold air.
When balloons are filled with this they are lighter than air?
Hot air, hydrogen or helium are lighter than cold air.
Explain why lighter-than air balloons fly?
"Lighter than air." Think about it for a second.
A basic gas lighter than air?
Hydrogen and Helium are both lighter than air.
What is the difference between lighter than air vehicles and heavier than air vehicles?
Just, simply, Lighter than Air Vehicles are lighter than air, so that makes them fly, and Heavier than air vehicles are heavier than air, but they use airfoils on the wings to fly.
How many times lighter is hydrogen than air?
HYDROGN IS 14 TIMES LIGHTER THAN AIR.
