is it manmade or is it natural?
2006-10-21 05:10:10 · 5 answers · asked by NewYorkGuy 2 in Environment
Tetra-ethyl lead (also known as TEL, lead tetraethyl and tetraethyllead) is a toxic organometallic chemical compound, with formula (CH3CH2)4Pb, which was once used as a gasoline (petrol) additive. It is still in use today as an additive in aviation fuel.
TEL is produced by reacting ethyl chloride with a sodium-lead alloy.
Pb + 4 Na + 4 CH3CH2Cl → (CH3CH2)4Pb + 4 NaCl
The product, TEL, is a viscous colorless liquid. Because TEL is charge neutral and contains an exterior of alkyl groups, it is highly lipophilic and soluble in petrol.
The most noteworthy feature of TEL is the weakness of its four C-Pb bonds. At the temperatures found in internal combustion engines (CH3CH2)4Pb decomposes, first into (CH3CH2)3Pb and ethyl radicals. These radicals scavenge other radicals and prevent the initiation of combustion, which itself is a radical reaction, in order to delay ignition. When (CH3CH2)4Pb burns, it produces not only carbon dioxide and water,
2006-10-21 05:12:20 · answer #1 · answered by ☺♥? 6 · 0⤊ 1⤋
The TLA LED has the following meanings:
Light-emitting diode
Toshiyuki Kakuta uses the pseudonym L.E.D. on Konami's Bemani music game series.
The IATA airport code for Pulkovo Airport, near Saint Petersburg, Russia.
LEd a free environment for rapid TeX/LaTeX document development
Led Zeppelin, a British heavy metal band
It is also a common misspelling for Lead (the element)
2006-10-21 12:13:16 · answer #2 · answered by Anonymous · 0⤊ 1⤋
Well if you meant Lead, then yes it does exist in liquid form BUT it is actually a mix in compounds.
Ex: Lead is used as a pigment in lead paint.
Tetraethyl Lead was used in Lead fuels.
SO yes it is manmade.
2006-10-21 12:14:43 · answer #3 · answered by San Jose 3 · 0⤊ 1⤋
If you mean Lead the element, then lead melts at relatively low temperatures and so does exist naturally as a liquid as it melts at about 327 C
so you could melt lead with a cigarette lighter
chemical reaction
Pb(solid)------(HEAT)------>Pb (liquid)
2006-10-21 12:18:39 · answer #4 · answered by angle_of_deat_69 5 · 0⤊ 1⤋
You did not ask about lead, by chance? It melts at higher temperature easily. Mined in nature.
2006-10-21 12:23:00 · answer #5 · answered by Anonymous · 0⤊ 1⤋