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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 ).
Boiling point (°C) K b (°C⋅kg/mol) Freezing point (°C) K f (°C⋅kg/mol) Data source; ... Heptane: 98.4 [9] Isobutanol: 107.7 [10] n-Hexane: 0.66 68.7 [11] n ...
This page contains tables of azeotrope data for various binary and ternary mixtures of solvents. The data include the composition of a mixture by weight (in binary azeotropes, when only one fraction is given, it is the fraction of the second component), the boiling point (b.p.) of a component, the boiling point of a mixture, and the specific gravity of the mixture.
Melting point: −112 to −108 °C; −170 to −163 °F; 161 to 165 K ... It is an heptane molecule with a methyl group attached to its second atom. It is a ...
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.
Higher alkanes are naturally present in crude oil and can be obtained via fractional distillation.Saturated fatty acids decarboxylate to higher alkanes. Long olefins can be hydrogenated to yield higher alkanes. n-alkanes can be isolated via the formation of urea clathrates.They can also be synthesized through Kolbe electrolysis or other coupling reactions like the Wurtz reaction.
Carl Schaschke, 2014, A Dictionary of Chemical Engineering, Oxford University Press. G. I. Nikishin, Yu. N. Ogibin & L. Kh. Rakhmatullina, 1975, ‘Peroxydisulfate-initiated reactions of 1-heptene with acetic and propionic acids’, Bulletin of the Academy of Sciences of the USSR, Division of chemical science, volume 23, pages1479–1483
3,3-Dimethylpentane is one of the isomers of heptane. 3,3-Dimethylpentane has a boiling point of 86.0 °C and melting point of −134.9 °C. Its density is 0.6934. The refractive index is 1.39092 at 20 °C. [1]