Table of Contents
Does helium have viscosity?
Superfluid helium-4 is the superfluid form of helium-4, an isotope of the element helium. A superfluid is a state of matter in which matter behaves like a fluid with zero viscosity. This is made obvious by the fact that superfluidity occurs in liquid helium-4 at far higher temperatures than it does in helium-3.
Is helium low viscosity?
-It has no viscosity: it can flow through tiny holes. -It flows towards areas where the helium II is heated. Heat causes superfluid to convert to normal. A flow of superfluid into the heated area cools that area and restores the uniform mixture of normal and superfluid.
What are the properties of helium 2?
This liquid form is called helium II to distinguish it from normal liquid helium I. Helium II exhibits the property called superfluidity: its viscosity, or resistance to flow, is so low that it has not been measured. This liquid spreads in a thin film over the surface of any substance…
Can a fluid have zero viscosity?
Superfluidity is the characteristic property of a fluid with zero viscosity which therefore flows without any loss of kinetic energy. When stirred, a superfluid forms vortices that continue to rotate indefinitely.
What are 3 uses of helium?
The unique atomic structure of helium-3 promised to make it possible to use it as fuel for nuclear fusion, the process that powers the sun, to generate vast amounts of electrical power without creating the troublesome radioactive byproducts produced in conventional nuclear reactors.
What is the density of helium as a gas?
The density of a substance is its mass per unit volume. Because 1 gram molecular weight of a gas occupies a volume of 22.4 L under standard conditions, gas density is its gram molecular weight divided by 22.4 L. The density of helium is thus 0.179 g/L.
Is helium a solid liquid or a gas?
Because of its inertness and very low density, compressed helium gas and liquid helium are extremely versatile in their uses. Helium (He) is an odorless, colorless, tasteless, inert gas that is most often referred to as a “light gas with heavy uses.” Liquid helium is often used to cool metals to absolute zero (-460 degrees Fahrenheit ).
What is the molar mass of helium gas?
Helium has a molar mass of 4 grams per mole. It is the second element on the periodic table with an atomic number of 2. Helium has a very low density and is able to float through air because its density is far less than that of air. Helium is a non-metal that is in its gas state at room temperature.