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Cyclohexane is a colourless, flammable liquid with a distinctive detergent-like odor, reminiscent of cleaning products (in which it is sometimes used). Cyclohexane is mainly used for the industrial production of adipic acid and caprolactam, which are precursors to nylon. [5] Cyclohexyl (C 6 H 11) is the alkyl substituent of cyclohexane and is ...
In chemistry, the empirical formula of a chemical compound is the simplest whole number ratio of atoms present in a compound. [1] A simple example of this concept is that the empirical formula of sulfur monoxide , or SO, is simply SO, as is the empirical formula of disulfur dioxide , S 2 O 2 .
Gas properties Std enthalpy change of formation, Δ f H o gas –123.1 kJ/mol Standard molar entropy, S o gas: 298.19 J/(mol K) Heat capacity, c p: 105.3 J/(mol K) van der Waals' constants [4] a = 2311 L 2 kPa/mol 2 b = 0.1424 liter per mole
Each 6-atom interaction is worth 0.9 kcal/mol (3.8 kJ/mol) and each 7-atom interaction is worth 4 kcal/mol (17 kJ/mol). [ 4 ] The dashed lines indicate 6-atom interactions found in this conformation of ethyl cyclohexane, which amounts to approximately 2.7 kcal/mol (11 kJ/mol) in the enthalpic term of Free Energy.
The Benedict–Webb–Rubin equation (BWR), named after Manson Benedict, G. B. Webb, and L. C. Rubin, is an equation of state used in fluid dynamics.Working at the research laboratory of the M. W. Kellogg Company, the three researchers rearranged the Beattie–Bridgeman equation of state and increased the number of experimentally determined constants to eight.
However, the empirical formula for hexane is C 3 H 7. Likewise the empirical formula for hydrogen peroxide, H 2 O 2, is simply HO, expressing the 1:1 ratio of component elements. Formaldehyde and acetic acid have the same empirical formula, CH 2 O. This is also the molecular formula for formaldehyde, but acetic acid has double the number of atoms.
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The Antoine equation is a class of semi-empirical correlations describing the relation between vapor pressure and temperature for pure substances. The Antoine equation is derived from the Clausius–Clapeyron relation. The equation was presented in 1888 by the French engineer Louis Charles Antoine (1825–1897). [1]