Transcript Alkenes - eduBuzz.org

BLAZING AWAY!!!!
Natural Gas (2.1)
• What is the chemical name for
natural gas?
• What are the properties and formula
of methane?
• What gas in the air is used up when
methane burns?
• What 2 substances are formed when
methane burns completely?
• How can you test for these 2
substances?
Combustion (2.1)
• What is combustion?
• Why does a bunsen burn more
fiercely with the air-hole open?
• Why is combustion said to be an
exothermic reacion?
• What do the products of combustion
of methane prove about methane
itself?
Alkanes (2.2)
• What are the names and uses of some
common alkane mixtures?
• What is a hydrocarbon?
• What 2 substances are formed when
a hydrocarbon burns completely?
• What are the differences between a
molecular formula and a structural
formula?
Alkanes (2.2)
• Can you draw the structural formula
for the first 10 alkanes?
• What is the molecular formula for
the first 10 alkanes?
• Can you name the first 10 alkanes?
• What is the word equation for any
alkane burning in oxygen?
Homologous Series (2.2)
• What is the rule for working out the
number of hydrogen atoms in an alkane
molecule?
• What is a homologous series, and why are
the alkanes an example of one?
• What is the general formula for the
alkanes?
• Why are the products of combustion the
same for every alkane?
Fossil Fuels (2.3)
• Can you explain how coal and oil were
formed (where, what from, how long
it took)?
• Why are coal, oil and gas referred to
as fossil fuels?
• What is crude oil, and why does it
have to be refined?
Fractional Distillation (2.3)
• How can distillation be used to
separate the liquids in crude oil?
• What are fractions?
• As the boiling point of a fraction
increases, what happens to the speed
of evaporation, viscosity and
flammability?
Fractional Distillation (2.3)
• How does the size of a molecule
change as the boiling point of a
fraction increases?
• What are some of the fractions
distilled from crude oil and what are
they are used for?
• What are the typical numbers of
carbon atoms in each of the
fractions?
Alkenes (2.4)
• How are alkenes similar to alkanes in
their properties?
• Can you describe the chemical test
for telling an alkane and an alkene
apart?
• How are alkenes made from alkanes?
• What is the main type of substance
made from alkenes?
Alkenes (2.4)
• Why are alkenes also hydrocarbons?
• What is meant by a double bond?
• Can you name and draw the structural
formula of the first 10 alkenes?
• Can you work out the molecular
formula of the first 10 alkenes?
Alkenes (2.4)
• What is the word equation for any
alkene burning in oxygen?
• What is the functional group in an
alkene?
• How can you work out the number of
hydrogen atoms in an alkene molecule
if you know the number of carbon
atoms?
Alkenes (2.4)
• Why does methene not exist?
• What is the general formula for the
alkenes?
• Why do alkenes give the same
combustion products as alkanes?
Carbon (2.5)
• What are the symbol and properties
of carbon?
• Where are natural diamonds formed?
• What are the properties of diamond?
• Can you name 3 different forms of
carbon?
Carbon (2.5)
• Can you draw a diagram of the
experiment you would use to prove
the products of combustion of carbon
or a hydrocarbon?
• What is the word and formula
equation for carbon burning in air?
• What is carbon dioxide used for?
Carbon (2.5)
• What is the formula of carbon
monoxide, and how is it formed?
• Why is carbon monoxide dangerous?
• What is formed when carbon
monoxide burns in air?
Pollution (2.6)
• What are the main chemicals emitted
from car exhausts? Which of these
are considered to be pollutants?
• What can be done to reduce this
pollution?
• What is a catalyst?
• Which metals are used as catalysts in
catalytic converters?
Cracking (2.7/2.8)
• What does cracking mean in
chemistry?
• Can you describe an experiment to
demonstrate the cracking of an
alkane?
• What is the purpose of the steel
wool in the cracking experiment?
Cracking (2.7/2.8)
• How do the results of the experiment
show the products to be a mixture of
alkanes and alkenes?
• What are the important safety points
in the cracking experiment?
Cracking (2.7/2.8)
• Which fractions from crude oil are
most in demand?
• How do oil refineries meet this
demand?
• What is a catalytic cracker?
• Why are the products of cracking
then passed through a fractionating
column?
Saturation (2.7)
• What do the words saturated and
unsaturated mean? Give examples.
• What is the chemical test for
unsaturation in hydrocarbons?
• What is an addition reaction? Give an
example.
Isomers (2.9)
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What are isomers?
Can you draw some alkane isomers?
What is a cycloalkane?
Can you name the first ten cycloalkanes,
and give their molecular
and structural
formulae?
• What is the general formula of
cycloalkanes and why are they isomeric
with the alkenes?