C7 Flashcards by Unknown Unknown

Q

crude oil is…

A

a mixture of a very large number of compunds

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Q

what are most the compounds in a crude oil

A

hydrocarbons

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Q

is crude oil a compound

A

yes

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Q

formula for homologus series of alkanes is

A

CnH2n+2

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Q

methane formula

A

CH4

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Q

ethane formula

A

C2H6

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Q

propane formula

A

C3H8

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Q

Butane formula

A

C4H10

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Q

as you go up the fractional distilation what happens

A

boiling point and viscosity decreases

flammability increases

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Q

example of solvent

A

nail varnish remover

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Q

examples of lubricants

A

oil for car engines

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Q

examples of polymers

A

polythene

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Q

examples of detergents

A

washing up liquid

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Q

combustion of hydrocarbons produce

A

co2 and water

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Q

why are hydrocarbons broken down

A

to produce smaller more useful molecules

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Q

what is catalytic cracking

A

hydrocarbon heated to high temperature and a catalyst is used

Q

what is steam cracking

A

when hydrocarbon is heated and mixed with steam