enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Heats of vaporization of the elements (data page) - Wikipedia

    en.wikipedia.org/wiki/Heats_of_vaporization_of...

    Values refer to the enthalpy change in the conversion of liquid to gas at the boiling point (normal, 101.325 kPa ... G.W.C. Kaye and T. H. Laby in Tables of physical ...

  3. List of boiling and freezing information of solvents - Wikipedia

    en.wikipedia.org/wiki/List_of_boiling_and...

    Boiling pointC) K b (°C⋅kg/mol) Freezing pointC) K f (°C⋅kg/mol) Data source; Aniline: 184.3 3.69 –5.96 –5.87 K b & K f [1] Lauric acid: 298.9 44

  4. Methanediol - Wikipedia

    en.wikipedia.org/wiki/Methanediol

    The compound is closely related and convertible to the industrially significant derivatives paraformaldehyde ((CH 2 O) n), formaldehyde (H 2 C=O), and 1,3,5-trioxane ((CH 2 O) 3). [3] Methanediol is a product of the hydration of formaldehyde. The equilibrium constant for hydration is estimated to be 10 3, [4] CH 2 (OH) 2 predominates in dilute ...

  5. Formaldehyde - Wikipedia

    en.wikipedia.org/wiki/Formaldehyde

    In the commonly used formox process, methanol and oxygen react at c. 250–400 °C in presence of iron oxide in combination with molybdenum and/or vanadium to produce formaldehyde according to the chemical equation: [40] 2 CH 3 OH + O 2 → 2 CH 2 O + 2 H 2 O. The silver-based catalyst usually operates at a higher temperature, about 650 °C.

  6. Boiling-point elevation - Wikipedia

    en.wikipedia.org/wiki/Boiling-point_elevation

    The result is that in dilute ideal solutions, the extent of boiling-point elevation is directly proportional to the molal concentration (amount of substance per mass) of the solution according to the equation: [2] ΔT b = K b · b c. where the boiling point elevation, is defined as T b (solution) − T b (pure solvent).

  7. Boiling point - Wikipedia

    en.wikipedia.org/wiki/Boiling_point

    Water boiling at 99.3 °C (210.8 °F) at 215 m (705 ft) elevation. The boiling point of a substance is the temperature at which the vapor pressure of a liquid equals the pressure surrounding the liquid [1] [2] and the liquid changes into a vapor.

  8. Critical points of the elements (data page) - Wikipedia

    en.wikipedia.org/wiki/Critical_points_of_the...

    Also agrees with Celsius values from Section 4: Properties of the Elements and Inorganic Compounds, Melting, Boiling, Triple, and Critical Point Temperatures of the Elements Estimated accuracy for T c and P c is indicated by the number of digits.

  9. Ethylene carbonate - Wikipedia

    en.wikipedia.org/wiki/Ethylene_carbonate

    C 2 H 4 CO 3 + 2 CH 3 OH → CH 3 OCO 2 CH 3 + HOC 2 H 4 OH. The transesterfication of ethylene carbonate by methanol can be catalyzed by a high surface area (thermally exfoliated) graphitic carbon nitride (g-C 3 N 4) materials. This method reduces the chance of metal or halide contamination, and can offer yields of up to 60% at a temperature ...