Question

properties of gases with its S.I and CGS unit

Answer 1

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A gas is one of the three classical states of matter (the others being liquid and solid ).
Under standard temperature and pressure (STP, or 1 atm and 273 K), a substance which exists as a gas is called a pure 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).
If the boiling point of a substance is below 273 K, then the substance to be in gas form at STP.
Key Terms

absolute zero: the coldest possible temperature, zero on the Kelvin scale, or approximately −273.15 °C, −459.67 °F; total absence of heat; temperature at which motion of all molecules ceases
Gas as a State of Matter

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, 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.




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