Crude oil: A finite resource found in rocks, composed mainly of the remains of ancient biomass, particularly plankton buried in mud. It is a mixture of many compounds, which are not chemically bonded, and can be separated by physical methods such as distillation.
Mixture: A combination of two or more elements that are not chemically combined, where each substance retains its chemical properties.
Hydrocarbons: Compounds made up of hydrogen and carbon atoms only, with most in crude oil being saturated hydrocarbons called alkanes. They have the general formula CnH2n+2.
Alkanes: Saturated hydrocarbons with the general formula CnH2n+2; the first four alkanes are methane, ethane, propane, and butane.
Crude oil is a mixture of many compounds, mainly hydrocarbons, which are not chemically bonded, allowing separation by physical methods like distillation.
Most compounds in crude oil are hydrocarbons, predominantly alkanes (saturated hydrocarbons).
1. What is the primary chemical composition of most compounds in crude oil?
2. When was the process of fractional distillation of crude oil primarily established as a standard method for separating hydrocarbons?
3. Who is credited with proposing or discovering the process of fractional distillation?
Crude oil — main component?
Mixture of hydrocarbons from ancient biomass.
Hydrocarbons — composition?
Only hydrogen and carbon atoms.
Alkanes — formula?
CnH2n+2.
Fractional distillation — process?
Heating crude oil to separate by boiling points.
Short hydrocarbons — properties?
Less viscous, more flammable, lower boiling points.
Cracking — purpose?
Break large hydrocarbons into smaller, useful ones.
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