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13 Cards in this Set
- Front
- Back
What is the trend with regards to physical state of hydrocarbons ?
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Shorter chains are primarily liquids and gases, the longer the chain then gets the more solid it becomes.
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What is meant with a saturated hydrocarbon ?
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It has four hydrogens bonded to a single carbon atom.
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What is the key characteristic of an alkane ?
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Single bonds between carbon atoms.
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What is the general formula for alkanes ?
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CnH2n+2.
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Which intermolecular forces are present between alkane molecules ?
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London forces.
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Would you expect an alkane with a relatively long chain to have a higher or lower boiling point ?
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Higher.
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What is an isomer ?
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Molecules that have the same molecular formulas as other molecules but differ in structure.
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Why can the conformation of an alkane change ?
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The single bond between carbon atoms allow free rotation, therefore it can change its conformation.
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What are the two possibilities for conformers in alkanes ?
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1. Staggered
2. Eclipsed |
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How many carbons are usually in a stable cycloalkane ?
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Five or six.
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What are the two possible conformations for a cycloalkane with six carbons ? Indicate which is more stable.
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1. Boat
2. Chair (more stable) |
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What is the difference between primary, secondary, tertiary and quaternary carbons ?
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A primary carbon is attached to a single carbon atom, a secondary carbon is attached to two carbon atoms, a tertiary carbon is attached to three carbon atoms etc.
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True or false: Alkanes are highly reactive.
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False. Alkanes are relatively nonreactive.
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