Energy & Green Tech

Metal organic frameworks could turn greenhouse gas into 'gold'

Fluorine can be a beneficial ingredient in medicines because of its excellent pharmacological properties, according to Phillip Milner, assistant professor of chemistry and chemical biology in the College of Arts and Sciences ...

Energy & Green Tech

Math allows hydrogen blend in natural gas pipelines

Mathematical modeling can show how to safely blend hydrogen with carbon dioxide for transport in existing pipeline systems. A secure and reliable transition to hydrogen is one of the proposed solutions for the shift to a ...

Energy & Green Tech

US to invest $1.2 bn on facilities to pull carbon from air

The US government said Friday it will spend up to $1.2 billion for two pioneering facilities to vacuum carbon out of the air, a historic gamble on a still developing technology to combat global warming that is criticized ...

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Gas

Gas is one of the three classical states of matter (the others being liquid and solid). Near absolute zero, a substance exists as a solid. As heat is added to this substance it melts into a liquid at its melting point (see phase change), boils into a gas at its boiling point, and if heated high enough would enter a plasma state in which the electrons are so energized that they leave their parent atoms from within the gas. A pure gas may be made up of individual atoms (e.g. a noble gas or atomic gas like neon), elemental molecules made from one type of atom (e.g. oxygen), or compound molecules made from a variety of atoms (e.g. carbon dioxide). A gas mixture would contain a variety of pure gases much like the air. What distinguishes a gas from liquids and solids is the vast separation of the individual gas particles. This separation usually makes a colorless gas invisible to the human observer. The interaction of gas particles in the presence of electric and gravitational fields are considered negligible as indicated by the constant velocity vectors in the image.

The gaseous state of matter is found between the liquid and plasma states, the latter of which provides the upper temperature boundary for gases. Bounding the lower end of the temperature scale lie degenerative quantum gases which are gaining increased attention these days. High-density atomic gases super cooled to incredibly low temperatures are classified by their statistical behavior as either a Bose gas or a Fermi gas. For a comprehensive listing of these exotic states of matter see list of states of matter.

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