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OCR - A-Level - Chemistry - Alkanes and Alkenes (with bonding)
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A level Chemistry Mindmap am OCR - A-Level - Chemistry - Alkanes and Alkenes (with bonding), erstellt von Josh Anderson am 23/01/2017.
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chemistry
a level
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Josh Anderson
, aktualisiert more than 1 year ago
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Erstellt von
Josh Anderson
vor mehr als 7 Jahre
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OCR - A-Level - Chemistry - Alkanes and Alkenes (with bonding)
S-orbitals have sigma bonds between them
In sigma bonds, the overlap region of the electron orbitals lies directly between the two nuclei
Alkanes are non-polar (the polarity due to the differing electronegativities of carbon and hydrogen is negligible)
This is the case for all alkanes
Double bonds are stronger than single bonds, but are not double the strength
The intermolecular forces for alkanes are London dispersion forces (temporary dipole)
The boiling point of alkanes and alkenes increases as the length of the carbon chain increases.
There are more bonds to break, so more energy is required to do so.
Branched hydrocarbons have lower boiling points than straight-chain hydrocarbons.
There is more contact surface area between molecules, so more van der Waals forces. As a result, more energy is needed to break this.
P-orbitals have pi bonds between them
In pi bonds, the electron orbital overlap regions lie off to the side of the line connecting two nuclei
Medienanhänge
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4d71dadf-9485-4de4-b1eb-057f7a21616a (image/jpg)
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