What 4 compounds are found as gases (Alkanes)? - ANSWER Methane, Ethane,
Propane, Butane
What happens to the compound's physical properties as the number of Carbons
increases? - ANSWER Melting/Boiling point increases
Alkanes are considered to be ______ reactive (very/not very) - ANSWER Not very
Combustion of methane - ANSWER CH4 + 2O2 -> CO2 + 2H2O + energy
Combustion of ethane - ANSWER 2C2H6 + 7O2 -> 4CO2 + 6H2O + energy
Halogen alkanes are ________ reactive than alkanes (more/less reactive) -
ANSWER More reactive
What is one way to make alkanes react more vigorously? - ANSWER Halogenation
of Alkanes
Reaction between methane and chlorine - ANSWER CH4 + Cl - (UV light)-> CH3CL
+ HCl
State the name of this Hydroalkane: CH3Cl - ANSWER Chloromethane
Define isomer - ANSWER Same compound, different structure
(Example of an) Equation for cracking of Octane - ANSWER C8H18 -(Catalyst)-
(heat)-> C3H4 (ethene) + C6H12 (hexene)
Draw 2 different isomers of Butane - ANSWER
Draw 3-methyl pentane - ANSWER
Draw 2,2-dimethyl butane. - ANSWER
3 rules to keep in mind when naming halides - ANSWER 1. Longest chain possible
(of carbon)
2. Smallest number possible (eg 2, 2 dimethyl butane not 3, 3 dimethyl butane
(C6H14))
3. Follow alphabetical order (eg 2-bromo, 3-chloro, 3-methyl butane)
, Draw a reaction between Propane and Bromine (include names of compounds) -
ANSWER
What are the 2 main reactions alkanes undergo? - ANSWER Combustion and
Halogenation
Adding hydrogen to alkanes can also be known as a (________ reaction) on top of
being called a halogenation reaction - ANSWER Substitution reaction
Alkanes can only undergo a substitution reaction with _______ - ANSWER Halogens
Adding a halogen is called a ______ reaction - ANSWER Halogenation rxn
Adding a halogen to an alkane is also called a __________ reaction - ANSWER
Substitution rxn
Adding a halogen to an alkene is also called an __________ reaction - ANSWER
Addition rxn
Naming a halogen alkane depends on _______ - ANSWER The location of the
halogen
What is the main difference between alkanes and alkenes? - ANSWER Alkenes
have a double bond/alkanes don't
(+ General formula)
Double bonds can also be referred to as _______ - ANSWER Unsaturated bonds
The presence of double bonds makes an alkene __________ reactive than an
alkane (more/less reactive) - ANSWER More reactive
Draw ethene - ANSWER
Draw but-1-ene - ANSWER
As you go down the alkene group, the melting/boiling point _______
(increases/decreases) - ANSWER Increases
How do you test to differentiate alkanes and alkenes? - ANSWER Test for saturation
What do you need to consider when naming an alkene? - ANSWER Position of
double bonds
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