Weight of cubic meter of helium?

Answer 1

The short answer is 28.9 grams or 1.02 ounces.

But it depends on the temperature and pressure of the air, the helium, and possibly also what's holding the helium.

The upward force on the helium is called the buoyancy. The weight it can "pick up" is the buoyancy less the weight of the helium itself.

At sea level pressure, air has a density of 1.2 g/L at an 'normal' pressure.

Helium is of course less dense, at 0.1786 g/L.

1 (cubic foot) = 28.3168466 L

So the net buoyancy is (1.2 g/L - 0.1786 g/L) * 28.32 L = 28.9 g.

The helium's container matters because some containers are compressible. Eg a rubber balloon will expand as it rises or shrink as it falls. This can affect the buoyancy.

Answer 2

That would depend on the temperature and pressure - but if you assume STP of 273.15 K (0° Celsius) and 1 atm, 1 cubic meter of gas would contain 45.76 moles of Helium. At 4.002 g per mole, that would be 183.2 g or 0.1832 kg. Subject to earth's gravitational acceleration - which is 9.81 m/s², that would weigh 1.797 N.

Answer 3

Depending on how big the balloon is and how much you put in it, it might be around one cubic foot.

Answer 4

That all depends on how much helium has been stuffed into that cubic foot.

Have you ever heard of the process of "compression" ?

Answer 5

.1786 kg