Physical properties of benzene
Benzene is a colorless, sweet and transparent liquid at room temperature. Its density is less than that of water and has a strong aromatic smell. The boiling point of benzene is 80.1 ℃ and the melting point is 5.5 ℃. The density of benzene is 0.88 g / cm3, but its molecular weight is heavier than that of water. Benzene is difficult to dissolve in water, and 1.7g benzene can be dissolved in 1 liter of water. However, benzene is a good organic solvent and has strong ability to dissolve organic molecules and some non-polar inorganic molecules. It is miscible with most organic solvents except glycerin, glycol and other polyols.
The boiling point of benzene is 69.25 ℃ and the content of benzene is 91.2%. Therefore, benzene distillation is often added in the reaction with water formation to remove water.
The molar mass is 78.11g/mol.
Ignition energy: 0.20mj.
Upper explosion limit (volume fraction): 8.0%.
Lower explosion limit (volume fraction): 1.2%.
Combustion heat: 3303.08kj/mol (25 ℃, gas)).
Solubility: insoluble in water, soluble in most organic solvents such as ethanol, ether and acetone.
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