Search results
Results from the WOW.Com Content Network
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 ).
This Wikipedia page provides a comprehensive list of boiling and freezing points for various solvents.
The ideal gas equation can be rearranged to give an expression for the molar volume of an ideal gas: = = Hence, for a given temperature and pressure, the molar volume is the same for all ideal gases and is based on the gas constant: R = 8.314 462 618 153 24 m 3 ⋅Pa⋅K −1 ⋅mol −1, or about 8.205 736 608 095 96 × 10 −5 m 3 ⋅atm⋅K ...
Note that the especially high molar values, as for paraffin, gasoline, water and ammonia, result from calculating specific heats in terms of moles of molecules. If specific heat is expressed per mole of atoms for these substances, none of the constant-volume values exceed, to any large extent, the theoretical Dulong–Petit limit of 25 J⋅mol ...
The molar mass of atoms of an element is given by the relative atomic mass of the element multiplied by the molar mass constant, M u ≈ 1.000 000 × 10 −3 kg/mol ≈ 1 g/mol. For normal samples from Earth with typical isotope composition, the atomic weight can be approximated by the standard atomic weight [ 2 ] or the conventional atomic weight.
Molar mass: 96.17 g/mol Density: 0.824 g/cm 3: Boiling point: ... The two heptane radical rings then untwist to an unstrained conformation, ...
Molar mass: 114.232 g·mol −1 Appearance Colourless liquid Odor: Odourless Density: 705 mg mL −1: Melting point: −122 to −120 °C; −188 to −184 °F; 151 to 153 K Boiling point: 118 to 120 °C; 244 to 248 °F; 391 to 393 K Vapor pressure: 5.0 kPa (at 37.7 °C)
Molar mass: 114.232 g·mol −1 Appearance Colourless liquid Odor: Odourless Density: ... It is an heptane molecule with a methyl group attached to its second atom ...