4.7.2🫐 Flashcards
How are alkenes produced?
From the cracking of a hydrocarbon
What are alkenes?
They are unsaturated hydrocarbons with at least one carbon - carbon double bond.
They are apart of the homologous series with the general formula/functional group: C(n)H(2n)
What are the first 4 alkenes?
Ethene, propene, butene, Pentene
What determines the reactions of an organic compound?
Functional group
What is the test to determine an alkene?
Bromine water test.
Observation: orange to colourless
How do alkenes react with oxygen in combustion?
They react the same way as other hydrocarbons, but they tend to burn in air with smoky flames because of incomplete combustion.
What occurs when an alkene reacts with hydrogen, water and halogens?
But the addition of atoms across the carbon-carbon double bond so that the double bond becomes a single carbon-carbon bond.
What is the functional group of an alcohol?
-OH
What are the first 4 members of a homologous series of alcohols.
Methanol, ethanol, Butanol, propanol
How can alcohols be represented in form?
(Example)
CH(n)CH(n)OH = Ethanol
What happens to an alcohol when it reacts with air?
Produce carbon dioxide and water
What happens when an alcohol is dissolved in water?
They form a neutral solution
What happens when alcohols react with sodium?
They produce hydrogen and salt.
What happens when an alcohol reacts with an oxidising agent?
They form carboxylic acids
What are methanol and ethanol used for?
Methanol: chemical feedstock, antifreeze, biodiesel
Ethanol: main alcohol in drinks, used as solvents and fuels
