Homologous Series - Unit 2 Flashcards
What is an Exothermic reaction ?
An exothermic reaction is one in which heat is released
What is a fuel?
A substance that when burned, provides energy for the reaction.
What is a hydrocarbon?
A chemical compound which contains only the elements of hydrogen and carbon.
What is fractional distilation?
seperates crude oil into a number of different parts called fractions
Talk about the oil fractions in a fractionating column.
As you go up the column, the hydrocarbons have
- lower boiling points
-lower viscosity
-higher flamnmibility
What is a homologous series?
A family of compounds with similar chemical properties and the same general formula.
What do Alkanes always end in and what is their general formula?
-ane
Cn H2n+2
What is the first 8 prefixes?
meth-
eth-
prop-
but-
pent-
hex-
hept-
oct
Draw 2-methylbutane
CH3-CH(CH3)-CH2-CH3
Draw 3-methylpentane
CH3-CH2-CH(CH3)-CH2-CH3
Draw 2,2-dimethylbutane
CH3-C(C2H6)-CH2-CH3
What does Saturated mean ?
Only contains single carbon to carbon onds
What is always the ending of the alkenes and what is their structural formula?
-ene
-CnH2
What does unsaturated mean?
Contains more than one carbon to carbon double bond
What is the general trend of Hydrocarbons
As the number of carbons increase, so too does the boiling point
