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Dichloromethane (DCM, methylene chloride, or methylene bichloride) is an organochlorine compound with the formula C H 2 Cl 2. This colorless, volatile liquid with a chloroform-like, sweet odor is widely used as a solvent. Although it is not miscible with water, it is slightly polar, and miscible with many organic solvents. [12]
Gas properties Std enthalpy change of formation, ... log 10 of Dichloromethane vapor pressure. Uses formula: ...
Gas properties Std enthalpy change of formation, Δ f H o gas –83.68 kJ/mol Standard molar entropy, S o gas: 234.36 J/(mol K) at 100 kPa Enthalpy of combustion, Δ c H o gas –764.0 kJ/mol Heat capacity, c p: 40.70 J/(mol K) at 25 °C van der Waals' constants [6] a = 757.0 L 2 kPa/mol 2 b = 0.06483 liter per mole
Vacuum distillation or distillation under reduced pressure is a type of distillation performed under reduced pressure, which allows the purification of compounds not readily distilled at ambient pressures or simply to save time or energy. This technique separates compounds based on differences in their boiling points.
Chloroform converts slowly in the presence of UV light and air to the extremely poisonous gas, phosgene (COCl 2), releasing HCl in the process. [75] 2 CHCl 3 + O 2 → 2 COCl 2 + 2 HCl. To prevent accidents, commercial chloroform is stabilized with ethanol or amylene, but samples that have been recovered or dried no longer contain any stabilizer.
An example of photochlorination at low temperatures and under ambient pressure is the chlorination of chloromethane to dichloromethane. The liquefied chloromethane (boiling point -24 °C) is mixed with chlorine in the dark and then irradiated with a mercury-vapor lamp. The resulting dichloromethane has a boiling point of 41 °C and is later ...
Liquefaction is used for analyzing the fundamental properties of gas molecules (intermolecular forces), or for the storage of gases, for example: LPG, and in refrigeration and air conditioning. There the gas is liquefied in the condenser , where the heat of vaporization is released, and evaporated in the evaporator , where the heat of ...
Chloromethane, also called methyl chloride, Refrigerant-40, R-40 or HCC 40, is an organic compound with the chemical formula CH 3 Cl.One of the haloalkanes, it is a colorless, sweet-smelling, flammable gas.