Alkanes (OCR A-Level Chemistry A): Flashcards
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General formula of alkanes
General formula of alkanes
Type of hydrocarbon that alkanes are
Type of hydrocarbon that alkanes are
Saturated hydrocarbons
Name for single covalent bonds in alkanes
Name for single covalent bonds in alkanes
Sigma bonds (-bonds)
How sigma bonds form
How sigma bonds form
Direct overlap of two atomic orbitals
Bond angle in tetrahedral geometry
Bond angle in tetrahedral geometry
Approximately
Number of sigma bonds each C atom forms in alkanes
Number of sigma bonds each C atom forms in alkanes
Four
Effect of chain length on alkane boiling point
Effect of chain length on alkane boiling point
Increases with longer chains
Why longer alkanes have higher boiling points
Why longer alkanes have higher boiling points
Larger surface area, stronger London forces
Boiling point of branched vs straight-chain isomers
Boiling point of branched vs straight-chain isomers
Branched have lower boiling points
Why branched alkanes have lower boiling points
Why branched alkanes have lower boiling points
Compact shape, less surface contact, weaker London forces