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9.1 – Journal #1Classifying Carbon CompoundsClassifying Carbon Compounds: Use the structural
formulas below to answer the following questions.1. How many bonds does each carbon atom form in
each of the compounds shown?2. What is the chemical formula for each compound?
Use the format CXHY. 3. Classify the
compounds into two groups.
4. Explain the classification system.
5. Define “isomer”. 6. Which molecules
are isomers of one another?
9.1 – Journal #21. Define “polar covalent molecule”. Give
an example of a molecule that is polar and draw where the positive and negative charges are.
2. Which of the following is NOT a molecule: CO2, H2O, N2, CH4, MgO. Now, explain WHY it isn’t a molecule.
3. What is the name for all of the molecules that contain Carbon and Hydrogen (it’s a vocabulary word).
CARBONStructure , Bonds and
Molecules
CARBON: Where is it in the Periodic Table?
What is the atomic number and weight?
CARBON: What is the Lewis Dot Structure?
• How many electrons does it need?• FOURFOUR
• How many bonds will it form?• FOURFOUR
• What TYPE of bonds will it form?• COVALENT!!!!
CARBON: What is the Lewis Dot Structure?
• What are all the ways Carbon can make FOUR COVALENT BONDS?
CARBON: What is the Lewis Dot Structure?
• All single covalent bonds
• ALKANESANES• This is This is ethaneethane
CARBON: What is the Lewis Dot Structure?
• DOUBLE covalent bond to ANOTHER Carbon
• ALKENESENES• This is This is ethene (or ethylene)ethene (or ethylene)
CARBON: What is the Lewis Dot Structure?
• TRIPLE covalent bond to ANOTHER Carbon
• ALKYNESYNES• This is This is ethyneethyne
CARBON: Unique in all the Universe!
• 6th most common element on Earth• Basis for MANY, MANY molecules
CARBON: Unique in all the Universe!
• Carbon comes in many forms.
• Covalently bonded to other elements.
• Caffeine
Methane
CARBON: Unique in all the Universe!
• To itself.
Fullerene
Graphite
Adrenaline Nicotine
Diamond (network solid)
CARBON: Unique in all the Universe!
• In chains.
Propane - hydrocarbon
Vitamins (Carotene)
Fats
CARBON: Unique in all the Universe!
• In rings.
Benzene
Fullerene
(Buckyball)
Pyrene
CARBON: Unique in all the Universe!
• In branches.
DNA
Fats - lipids
CARBON: ORGANIC CHEMISTRY
CARBON IS UNIQUE AND FORMS MANY MOLECULES
ORGANIC: from LIVING THINGS – ORGANIC: from LIVING THINGS – always contain Carbon and Hydrogen always contain Carbon and Hydrogen (sometimes O)(sometimes O)
INORGANIC: non-living, or man-madeINORGANIC: non-living, or man-made
Glucose = carbohydrate
C6H12O6
Polyethylene = plastics, -
C2H4
Organic Molecules: HYDROCARBONSNumber of
carbon atoms
Alkane -Saturated
Alkene Alkyne Cycloalkane
1 Methane — — —
2 Ethane Ethene Ethyne —
3 Propane Propene Propyne Cyclopropane
4 Butane Butene Butyne Cyclobutane
5 Pentane Pentene Pentyne Cyclopentane
6 Hexane Hexene Hexyne Cyclohexane
7 Heptane Heptene Heptyne Cycloheptane
8 Octane Octene Octyne Cyclooctane
9 Nonane Nonene Nonyne Cyclononane
10 Decane Decene Decyne Cyclodecane
Organic Molecules: HYDROCARBONS
As you add more carbon to the hydrocarbon, the molecule becomes heavier and properties change.
Name Molecular Formula
Molecular Mass
Melting Point (oC)
Boiling Point (oC)
State (25oC, 101.3k
Pa)
Density (liquid g cm-3, 20oC)
Uses
methane CH4 16 -182 -162 gas
major compone
nt of natural
gas (fuel)
ethane C2H6 30 -183 -88.6 gas component of
natural gas (fuel)
propane C3H8 44 -188 -42.1 gas
component of liquefied petroleum gas (LPG), bottled
gas (fuel)
butane C4H10 58 -138 -0.5 gas
component of liquefied petroleum gas (LPG),
cigarette lighters (fuel)
pentane C5H12 72 -130 36.1 liquid 0.626component of
petrol (fuel)
hexane C6H14 86 -95.3 68.7 liquid 0.659component of
petrol (fuel)
decane C10H22 142 -30 174 liquid 0.730component of
petrol (fuel)
hexadecane C16H34 226 18.5 288 liquid 0.775
component of diesel fuel &
heating oil
eicosane C20H42 282 36 343 solid
Organic Molecules: HYDROCARBONSHow do we separate the different weights so we can use them?
Fractional distillation.http://science.howstuffworks.com/oil-refining4.htm
VIDEO – REAL PLAYER
Organic Molecules: Hydrocarbons
How do we use MANY hydrocarbons?COMBUSTION
• Burning coal: C + O2 CO2
• Burning natural gasBurning natural gas:: CH4 + 2O2 CO2 + 2H2O
• Burning gasolineBurning gasoline:: 2C8H18 + 25O2 16CO2 + 18H20
Incomplete combustion creates CO (Carbon monoxide) Incomplete combustion creates CO (Carbon monoxide) instead of COinstead of CO22
Organic Molecules: Hydrocarbons
Often times fossil fuels contain the elements Often times fossil fuels contain the elements NITROGENNITROGEN AND AND SULFURSULFUR..
When they are burned, they combine with water and create ACID ACID RAIN.RAIN.
ALL combustion creates COALL combustion creates CO22
COCO22 + H + H22O O H H22COCO33 ((Carbonic acid)Carbonic acid)
Combustion of gasoline creates NOCombustion of gasoline creates NO22
NONO22 + H + H22O O H H22NONO33 ((Nitric acid)Nitric acid)
Combustion of coal creates SOCombustion of coal creates SO33
SOSO33 + H + H22O O H H22SOSO44 ((Sulfuric acid)Sulfuric acid)
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