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The melting points of the alkanes follow a similar trend to boiling points for the same reason as outlined above. That is, (all other things being equal) the larger the molecule the higher the melting point. There is one significant difference between boiling points and melting points. Solids have a more rigid and fixed structure than liquids.
However the higher melting points of these alkanes can cause problems at low temperatures and in polar regions, where the fuel becomes too thick to flow correctly. Mixtures of the normal alkanes are used as boiling point standards for simulated distillation by gas chromatography. [1]
The following is a list of straight-chain alkanes, the total number of isomers of each (including branched chains), and their common names, sorted by number of carbon atoms. [ 1 ] [ 2 ] Number of C atoms
Melting point: 28 to 30 °C (82 to 86 °F; 301 to 303 K) ... Octadecane is distinguished by being the alkane with the lowest carbon number that is unambiguously solid ...
Melting point: 16.8 to 10.0 °C; 62.1 to 49.9 °F; 289.9 to 283.1 K Boiling point: ... Pentadecane is an alkane hydrocarbon with the chemical formula C 15 H 32.
Heptane or n-heptane is the straight-chain alkane with the chemical formula H 3 C(CH 2) 5 CH 3 or C 7 H 16.When used as a test fuel component in anti-knock test engines, a 100% heptane fuel is the zero point of the octane rating scale (the 100 point is 100% iso-octane).
Melting point: 4 to 6 °C; 39 to 43 °F; 277 to 279 K Boiling point: ... Tetradecane is an alkane hydrocarbon with the chemical formula CH 3 (CH 2) 12 CH 3.
Melting point: −130: −165.2: −90.0 Boiling point: 36: 29.9: 40.1 ... Alkanes are broken apart at high temperatures, often in the presence of a zeolite catalyst ...