Liquefied gases chemicals

In addition to volume changes the effect of temperature is also important. Thus the specific latent heat of vaporization of a chemical is the quantity of heat, expressed as kJ/kg, required to change unit mass of liquid to vapour with no associated change in temperature. This heat is absorbed on vaporization so tliat residual liquid or tlie sunoundings cool. Alternatively an equivalent amount of heat must be removed to bring about condensation. Thus the temperature above a liquefied gas is reduced as tlie liquid evaporates and tlie bulk liquid cools. There may be consequences for heat transfer media and the strength of construction materials at low temperatures. 

Ammonia is shipped as a liquefied gas under its own vapour pressure of 114 psig (7.9 bar) at 21°C. Uses are to be found in refrigeration, fertilizer production, metal industries, the petroleum, chemical and rubber industries, domestic cleaning agents and water purification. Aqueous solutions of ammonia are common alkaline laboratory reagents ca 0.88 solution is the strongest available. Ammonia gas is expelled on warming. 

Chemical Designations - Synonyms Hydrochloric acid, anhydrous Chemical Formula Hcl. Observable Characteristics - Physical State (asslipped) Compressed liquefied gas Color Colorless to slightly yellow Odor Sharp, pungent, irritating. 

Chemical Designations - Syrwnyms Arctic Chloromethane Chemical Formula CH3CI. Observable Characteristics - Physical State (as shipped) Liquefied gas Color Colorless Odor Faint, sweet, non-irritating faint ether-like. 

Liquid ammonia and the solvent may explode when mixed. (It is possible this was a liquefied gas (physical) explosion, rather than an exothermic chemical reaction.)... 

T0150 Cement-Lock, L.L.C., Cement-Lock Technology T0154 CF Systems Corporation, Liquefied Gas Solvent Extraction T0161 Chemical Oxidation—General... 

The primary categories of hydrogen storage are physical and chemical. Physical storage includes liquefied hydrogen and compressed hydrogen gas. Chemical storage includes the formation of metal hydrides. These are seen to be the most likely near-term options. 

This means "Boiling Liquid Expanding Vapor Explosion" and characterizes the physical explosion of a liquefied gas/supercritical fluid that is brutally decompressed to atmospheric pressure, in case of pressure vessel rupture or opening. Catastrophic BLEVE occurred when liquefied petroleum gases vessels burst (Mexico, Feyzin,...), followed by the "chemical" explosion due to gas cloud inflammation. In fact, this hazard is directly linked to metal weakening in case of fire around the vessel(s). It is the reason why it is recommended to install fire detectors that could order immediate depressurization of the whole plant in case of fire. 

Synonyms -Butane Butyl hydride Methylethyl-methane Liquefied petroleum gas Chemical/Pharmaceutical/Other Class Aliphatic hydrocarbon... 

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