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What are the properties of helium-3?

What are the properties of helium-3?

Helium-3 (3He see also helion) is a light, stable isotope of helium with two protons and one neutron (the most common isotope, helium-4, having two protons and two neutrons in contrast). Other than protium (ordinary hydrogen), helium-3 is the only stable isotope of any element with more protons than neutrons.

What is thermal conductivity of helium?

The value of thermal conductivity for most gases and vapors range between 0.01 and 0.03 W/mK at room temperature. Notable exceptions are Helium (0.15) and Hydrogen (0.18).

What are the properties of liquid helium?


Properties of liquid helium Helium-4 Helium-3
Boiling point at one atmosphere 4.2 K (−268.95 °C) 3.2 K (−269.95 °C)
Minimum melting pressure 25 bar (360 psi) 29 bar (420 psi) at 0.3 K (−272.850 °C)
Superfluid transition temperature at saturated vapor pressure 2.17 K (−270.98 °C) 1 mK in the absence of a magnetic field

What is the calorific value of helium?

Chemical, Physical and Thermal Properties of Helium – He

Molecular Weight 4.0026
Specific Heat Ratio – cp/cv 1.66
Gas constant – R – (ft lb/lboR, J/kgoC) 386, 2077
Thermal Conductivity (Btu/hr ft oF, W/moC) 0.086, 0.149
Boiling Point – saturation pressure 14.7 psia and 760 mm Hg – (oF, oK) -452, 4.22

Is helium-3 worth going to the Moon?

Unlike Earth, which is protected by its magnetic field, the Moon has been bombarded with large quantities of Helium-3 by the solar wind. It is thought that this isotope could provide safer nuclear energy in a fusion reactor, since it is not radioactive and would not produce dangerous waste products.

Is helium-3 on the Moon?

Helium-3 is a rare isotope on Earth, but it is abundant on the Moon. Throughout the space community lunar Helium-3 is often cited as a major reason to return to the Moon.

Is helium a good thermal insulator?

Air and other gases are generally good insulators, in the absence of convection. Light gases, such as hydrogen and helium typically have high thermal conductivity. Dense gases such as xenon and dichlorodifluoromethane have low thermal conductivity.

Is helium a good insulator?

Helium is chemically unreactive under all normal conditions due to its valence of zero. It is an electrical insulator unless ionized. As with the other noble gases, helium has metastable energy levels that allow it to remain ionized in an electrical discharge with a voltage below its ionization potential.

What are 3 interesting facts about helium?

Helium has the lowest boiling point of all elements—4.2 degrees Kelvin (that -268.8 Celsius)—just 4 degrees above absolute zero. Helium is the only element that cannot be solidified by sufficient cooling at normal atmospheric pressure. Helium was the first element not to be discovered on earth.

Can you burn helium?

Helium is a special gas called a Noble Gas, which means it doesn’t burn.

Can helium-3 explode?

It was the largest ever nuclear explosion. One ton of helium-3 has the potential to produce 1.5 times more destructive power than the Tsar Bomba. In fact, fusion is a very real and workable technology and has been with us since the Ivy Mike hydrogen bomb detonation in 1952.