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  2. Vaillant Group - Wikipedia

    en.wikipedia.org/wiki/Vaillant_Group

    The history of the Vaillant Group dates back to 1874, when Johann Vaillant set up a master fitter's business. In 1894 Johann Vaillant patented a new "closed-system" gas-fired bathroom boiler. [3] This was the first device that made it possible to heat water hygienically, without contaminating it with combustion gases.

  3. Tankless water heating - Wikipedia

    en.wikipedia.org/wiki/Tankless_water_heating

    Time-of-use metering and peak electrical loads: Tankless electric heaters, if installed in a large percentage of homes within an area, can create demand management problems for electrical utilities. Because these are high-current devices, and hot water use tends to peak at certain times of the day, their use can cause short spikes in ...

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

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

    This Wikipedia page provides a comprehensive list of boiling and freezing points for various solvents.

  5. Fugacity - Wikipedia

    en.wikipedia.org/wiki/Fugacity

    The fugacity of a condensed phase (liquid or solid) is defined the same way as for a gas: = ⁡ and = It is difficult to measure fugacity in a condensed phase directly; but if the condensed phase is saturated (in equilibrium with the vapor phase), the chemical potentials of the two phases are equal (μ c = μ g).

  6. Glycerol (data page) - Wikipedia

    en.wikipedia.org/wiki/Glycerol_(data_page)

    Phase behavior Triple point: 291.8 K (18.7 °C), ~99500 Pa Critical point: 850 K (577 °C), 7500 kPa Std enthalpy change of fusion, Δ fus H o: 18.28 kJ/mol Std entropy change

  7. Wallerant Vaillant - Wikipedia

    en.wikipedia.org/wiki/Wallerant_Vaillant

    Young boy, possibly the brother of the artist, Mezzotint The painter Maria van Oosterwijck, 1671, by Wallerant Vaillant A couple painted by Wallerant Vaillant. ( Gemäldegalerie , Berlin) Wallerant Vaillant (30 May 1623 – 28 August 1677) was a painter of the Dutch Golden Age and one of the first artists to use the mezzotint technique, which ...

  8. Édouard Vaillant - Wikipedia

    en.wikipedia.org/wiki/Édouard_Vaillant

    Marie Édouard Vaillant (26 January 1840 – 18 December 1915) was a French politician. Born in Vierzon , Cher , son of a lawyer, Édouard Vaillant studied engineering at the École Centrale des Arts et Manufactures , graduating in 1862, and then law at the Sorbonne .

  9. Jehan Vaillant - Wikipedia

    en.wikipedia.org/wiki/Jehan_Vaillant

    Jehan Vaillant (fl. 1360–1390; also spelled Johannes Vayllant) was a French composer and music theorist. He is named immediately after Guillaume de Machaut by the Règles de la seconde rhétorique , which describes him as a "master … who had a school of music in Paris". [ 1 ]