enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Electrochemical reduction of carbon dioxide - Wikipedia

    en.wikipedia.org/wiki/Electrochemical_reduction...

    Carbon monoxide can be produced from CO 2 RR over various precious metal catalysts. [31] Steel has proven to be one such catalyst., [32] or hydrogen. [33] Mechanistically, carbon monoxide arises from the metal bonded to the carbon of CO 2 (see metallacarboxylic acid). Oxygen is lost as water. [34]

  3. Boudouard reaction - Wikipedia

    en.wikipedia.org/wiki/Boudouard_reaction

    The effect of temperature on the extent of the Boudouard reaction is indicated better by the value of the equilibrium constant than by the standard free energy of reaction. The value of log 10 ( K eq ) for the reaction as a function of temperature in Kelvin (valid between 500– 2200 K ) is approximately: [ 4 ]

  4. Carbon dioxide (data page) - Wikipedia

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

    O–C–O: 180° , [3] decreasing to as low as 163° at higher temperature and/or pressure [4] Magnetic susceptibility: −0.49×10^−6 cm^3/mol Surface tension: 4.34 dyn/cm at 20 °C and equilibrium pressure Viscosity [5] of liquid at equilibrium pressure 0.0925 mPa·s at 5 °C 0.0852 mPa·s at 10 °C 0.0712 mPa·s at 20 °C 0.0625 mPa·s at ...

  5. Carbon dioxide - Wikipedia

    en.wikipedia.org/wiki/Carbon_dioxide

    At a pressure of 1 atm (0.101325 MPa), the gas deposits directly to a solid at temperatures below 194.6855(30) K [2] (−78.4645(30) °C) and the solid sublimes directly to a gas above this temperature. In its solid state, carbon dioxide is commonly called dry ice. Pressure–temperature phase diagram of carbon dioxide. Note that it is a log ...

  6. Ellingham diagram - Wikipedia

    en.wikipedia.org/wiki/Ellingham_diagram

    This analysis is usually used to evaluate the ease of reduction of metal oxides and sulfides. These diagrams were first constructed by Harold Ellingham in 1944. [ 1 ] In metallurgy , the Ellingham diagram is used to predict the equilibrium temperature between a metal , its oxide , and oxygen — and by extension, reactions of a metal with ...

  7. Thermite - Wikipedia

    en.wikipedia.org/wiki/Thermite

    Although the reactants are stable at room temperature, they burn with an extremely intense exothermic reaction when they are heated to ignition temperature. The products emerge as liquids due to the high temperatures reached (up to 2500 °C (4532°F) with iron(III) oxide)—although the actual temperature reached depends on how quickly heat can ...

  8. Atomic absorption spectroscopy - Wikipedia

    en.wikipedia.org/wiki/Atomic_absorption_spectroscopy

    The oldest and most commonly used atomizers in AAS are flames, principally the air-acetylene flame with a temperature of about 2300 °C and the nitrous oxide [4] system (N 2 O)-acetylene flame with a temperature of about 2700 °C. The latter flame, in addition, offers a more reducing environment, being ideally suited for analytes with high ...

  9. Thermogravimetric analysis - Wikipedia

    en.wikipedia.org/wiki/Thermogravimetric_analysis

    Thermogravimetric analysis or thermal gravimetric analysis (TGA) is a method of thermal analysis in which the mass of a sample is measured over time as the temperature changes. . This measurement provides information about physical phenomena, such as phase transitions, absorption, adsorption and desorption; as well as chemical phenomena including chemisorptions, thermal decomposition, and ...