Hydrocarbons 2 Flashcards
Crude Oil Fractions
Length of Hydrocarbons
fractional distillation of crude oil creates more longer chain hydrocarbons than short chain ones so catalytic cracking is needed
Catalytic Cracking
Conditions
600-700 C
Alumina or Silica Catalyst
Catalytic Cracking
What does it produce
1 short chain alkane and a alkene
Incomplete combustion
What is needed for it and what does it produce
happens when there is a lack of oxygen
produces carbon monoxide
Incomplete combustion
Problems with CO
it is a colourless odourless poisonous gas which reduces the blood’s capacity to carry oxygen
Why are Nitrogen and Sulphur Dioxides bad
They are pollutant and can cause acid rain
Problems with acid rain
Acid Rain can pollute lakes killing fish
It can damage limestone structures
Homologous Series
Definition
Organic compounds with the same general formula that differ by a CH2 group. Same trend in physical and chemical properties
General formulas
Alkanes
Alkenes
Alkanes CnH2n+2
Alkenes CnH2n
Bromine Water Test
Alkenes
Alkenes will turn bromine water from orange to colourless
Why are addition polymers difficult to dispose of
They are inert and therefore do not biodegrade
