Depends on the temperature and pressure of the gas. The boiling point of Helium (He) is about 4 K (or -269 C) at 1 atmospheric pressure. At room temperature (and for temperatures as low as 4 K) and normal atmospheric pressure, He is a gas. Below 4 K at 1 atmosphere, He is a liquid. Increasing the gas pressure will raise the boiling point -- the gas-liquid transition temperature will be higher.
it is a solid because it is like frozen gas
There is no word equation, except that helium will exist as liquid phase in liquid helium
Yes. conversion of liquid helium to gaseous helium is a physical property
Above -268.93 °C, helium is gas. Below -268.93 °C, helium is liquid. Helium cannot exist as solid.
Yes it is. Helium will be liquid below -268.93 °C
what is the density of helium at room temperature?
There is no word equation, except that helium will exist as liquid phase in liquid helium
Liquid Helium is colder than Liquid Hydrogen.
Yes. conversion of liquid helium to gaseous helium is a physical property
The liquid helium would boil and evaporate.
Above -268.93 °C, helium is gas. Below -268.93 °C, helium is liquid. Helium cannot exist as solid.
Yes it is. Helium will be liquid below -268.93 °C
what is the density of helium at room temperature?
Liquid helium in the helium I phase boils at about 5 K, lower than any other substance. (Liquid helium in the helium II phase does not boil, it simply evaporates. Helium is truly weird stuff at very low temperatures.)
Litre or cubic meter for helium as a gas; litres for helium as a liquid.
Every liquid, with the single exception of liquid helium, will eventually freeze if it gets cold enough. Helium, however, does not freeze.
Liquid helium is a lot colder than liquid nitrogen.
Because helium will not mix with hydrogen and oxygen.