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1-Heptanol is an alcohol with a seven carbon chain and the structural formula of CH 3 (CH 2) 6 OH. [1] It is a clear colorless liquid that is very slightly soluble in water, but miscible with ether and ethanol .
On the other hand, some constants, such as K f (the freezing point depression constant, or cryoscopic constant), depend on the identity of a substance, and so may be considered to describe the state of a system, and therefore may be considered physical properties. "Specific" properties are expressed on a per mass basis.
Numerical values of these thermodynamic properties are collected as tables or are calculated from thermodynamic datafiles. Data is expressed as temperature-dependent values for one mole of substance at the standard pressure of 101.325 kPa (1 atm), or 100 kPa (1 bar).
Heptanol may refer to any isomeric alcohols with the formula C 7 H 16 O: 1-Heptanol, an alcohol with a seven carbon chain and the structural formula of CH 3 (CH 2) 6 OH; 2-Heptanol, a secondary alcohol with the hydroxyl on the second carbon of the straight seven-carbon chain; 3-Heptanol, an organic alcohol with the chemical formula C 7 H 16 O ...
The formation of heptanal in the fractional distillation of castor oil [3] was already described in 1878. The large-scale production is based on the pyrolytic cleavage of ricinoleic acid [4] (Arkema method) and on the hydroformylation of 1-hexene with rhodium 2-ethylhexanoate as a catalyst upon addition of some 2-ethylhexanoic acid (Oxea method): [2] [5]
The classical Stefan problem deals with stationary materials with constant thermophysical properties (usually irrespective of phase), a constant phase change temperature and, in the example above, an instantaneous switch from the initial temperature to a distinct value at the boundary.
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The repulsive steepness parameter has a significant influence on the modeling of thermodynamic derivative properties, e.g. the compressibility and the speed of sound. Therefore, the Mie potential is a more flexible intermolecular potential than the simpler Lennard-Jones potential.