Gas
| Formula / Notation | PV = nRT; 22.414 L/mol (STP) |
|---|---|
| Also Known As | Gas phase, gaseous state, vapour (near condensation point) |
What is Gas?
One of the fundamental states of matter characterized by molecules moving freely with weak intermolecular forces. Gases expand to fill their containers, are highly compressible, and have low densities. Their behavior is described by gas laws (Boyle's, Charles's, ideal gas law).
Formula & Notation
Other Names / Synonyms: Gas phase, gaseous state, vapour (near condensation point)
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
One of the fundamental states of matter characterized by molecules moving freely with weak intermolecular forces. Gases expand to fill their containers, are highly compressible, and have low densities. Their behavior is described by gas laws (Boyle's, Charles's, ideal gas law).
Gases are essential in: industrial processes (O₂ in steelmaking, N₂ as inert atmosphere, Cl₂ in water treatment), energy (natural gas combustion, H₂ fuel cells), analytical chemistry (GC carrier gas: He, N₂, H₂), medicine (O₂ therapy, anaesthetics, NO for pulmonary hypertension), and refrigeration (…
Hazardous gas properties: flammable (H₂, CH₄, CO), toxic (Cl₂, H₂S, HCN, CO), asphyxiant (N₂, CO₂, Ar at high concentration), oxidising (O₂, F₂). All gases must be stored in properly secured cylinders away from heat. Gas detectors are essential in enclosed spaces.
The formula or notation for Gas is: PV = nRT; 22.414 L/mol (STP)