Nitrogen oxidesOrganic compoundsCarbonChlorideSolubleAmmoniaLightestAbundantProducesBoundGreekAtomicOdorlessFossilWaterFormFuelEarlySymbolHighlyStarsNatural gasEnergyDevelopmentProtonsLightest elementCompoundsNitrogenExists in molecularHindenburgCombustionFossil fuelSubstanceTemperatureChemicalHighEnvironmental
Nitrogen oxides2
- Combustion of hydrogen can lead to the thermal formation of nitrogen oxides. (wikipedia.org)
- The CEMS is usually applied to detect the emissions of air pollutants such as carbon monoxide (CO), carbon dioxide (CO 2 ), sulfur oxides (SO x ), nitrogen oxides (NO x ), hydrogen chloride (HCl), hydrogen fluoride (HF), ammonia (NH 3 ), water vapor (H 2 O), particulate matter, etc. (encyclopedia.pub)
Organic compounds4
- Most of the hydrogen on Earth exists in molecular forms such as water and organic compounds. (wikipedia.org)
- Hydrogen is nonmetallic (except when it becomes metallic at extremely high pressures) and readily forms a single covalent bond with most nonmetallic elements, forming compounds such as water and nearly all organic compounds. (wikipedia.org)
- It is colorless, odorless, shapeless, lighter than air and contains a mixture of several hydrocarbon gases, which are organic compounds consisting of some combination of hydrogen and carbon molecules. (ukdiss.com)
- Glycosides are a class of organic compounds in which a sugar molecule is bound to a non-sugar molecule, known as an aglycone or genin. (celignis.com)
Carbon3
- The visible flames in the photographs were the result of carbon compounds in the airship skin burning. (wikipedia.org)
- [1] A Song Dynasty military treatise of 1044 AD described different formulas for Chinese gun powder, which is a mixture of potassium nitrate ( K N O 3 ), carbon , and sulfur. (wikidoc.org)
- The term may also be used more broadly as a synonym of lipid-any substance of biological relevance, composed of carbon, hydrogen, or oxygen, that is insoluble in water but soluble in non-polar solvents. (mathisfunforum.com)
Chloride1
- It spontaneously reacts with chlorine and fluorine to form hydrogen chloride and hydrogen fluoride, respectively. (wikipedia.org)
Soluble1
- Hydrogen plays a particularly important role in acid-base reactions because these reactions usually involve the exchange of protons between soluble molecules. (wikipedia.org)
Ammonia1
- Most hydrogen is used near the site of its production, the two largest uses being fossil fuel processing (e.g., hydrocracking) and ammonia production. (wikipedia.org)
Lightest2
- Hydrogen is the lightest element. (wikipedia.org)
- E939 (Helium) is the second lightest and second most abundant element in the observable universe (hydrogen is the lightest and most abundant). (atamanchemicals.com)
Abundant1
- Hydrogen is the most abundant chemical substance in the universe, constituting roughly 75% of all normal matter. (wikipedia.org)
Produces1
- The "smell of sulfur" usually refers to either the odor of hydrogen sulfide , e.g. from rotten eggs, or of burning sulfur, which produces sulfur dioxide , the smell associated with burnt matches. (wikidoc.org)
Bound1
- The emergence of neutral hydrogen atoms throughout the universe occurred about 370,000 years later during the recombination epoch, when the plasma had cooled enough for electrons to remain bound to protons. (wikipedia.org)
Greek1
- Sulfur in Greek is theion (θεῖον), whence comes the prefix thio- . (wikidoc.org)
Atomic2
- Hydrogen is the chemical element with the symbol H and atomic number 1. (wikipedia.org)
- Sulfur or sulphur ( Template:PronEng , see spelling below ) is the chemical element that has the symbol S and atomic number 16. (wikidoc.org)
Odorless1
- It is from this part of the Bible that Hell is implied to "smell of sulfur", although as mentioned above sulfur is in fact odorless. (wikidoc.org)
Fossil1
- In contrast with other fossil fuels, it burns cleaner with more efficiently, while producing significantly fewer harmful pollutants than other fuels into the atmosphere. (ukdiss.com)
Water1
- When hydrogen is consumed in fuel cells, the only emission at the point of use is water vapour. (wikipedia.org)
Form1
- Sulfur, in its native form, is a yellow crystalline solid. (wikidoc.org)
Fuel2
- Hydrogen can be deployed as an energy source in fuel cells to produce electricity, or via combustion to generate heat. (wikipedia.org)
- In the manufacture of wood materials, bark is removed and discarded or burnt for fuel, an inefficient valorisation method considering the interesting and diverse chemistry of this resource. (celignis.com)
Early3
- In the early universe, the formation of protons, the nuclei of hydrogen, occurred during the first second after the Big Bang. (wikipedia.org)
- Hydrogen gas was first artificially produced in the early 16th century by the reaction of acids on metals. (wikipedia.org)
- Early alchemists gave sulfur its own alchemical symbol which was a triangle at the top of a cross. (wikidoc.org)
Symbol2
- For the most common isotope of hydrogen (symbol 1H) each atom has one proton, one electron, and no neutrons. (wikipedia.org)
- The H+ cation is simply a proton (symbol p) but its behavior in aqueous solutions and in ionic compounds involves screening of its electric charge by nearby polar molecules or anions. (wikipedia.org)
Highly2
- Hydrogen gas (dihydrogen or molecular hydrogen) is highly flammable: 2 H2(g) + O2(g) → 2 H2O(l) (572 kJ/2 mol = 286 kJ/mol = 141.865 MJ/kg) The enthalpy of combustion is −286 kJ/mol. (wikipedia.org)
- The hydrogen autoignition temperature, the temperature of spontaneous ignition in air, is 500 °C (932 °F). Pure hydrogen-oxygen flames emit ultraviolet light and with high oxygen mix are nearly invisible to the naked eye, as illustrated by the faint plume of the Space Shuttle Main Engine, compared to the highly visible plume of a Space Shuttle Solid Rocket Booster, which uses an ammonium perchlorate composite. (wikipedia.org)
Stars2
- Stars such as the Sun are mainly composed of hydrogen in the plasma state. (wikipedia.org)
- Large amounts of new E939 (Helium) are created by nuclear fusion of hydrogen in stars. (atamanchemicals.com)
Natural gas2
- Hydrogen flames in other conditions are blue, resembling blue natural gas flames. (wikipedia.org)
- It has come frontline of the international energy debate due to increasing demand in many countries and the worldwide consumption of natural gas is forecasted to double by 2035 [1]. (ukdiss.com)
Energy2
- The ground state energy level of the electron in a hydrogen atom is −13.6 eV, which is equivalent to an ultraviolet photon of roughly 91 nm wavelength. (wikipedia.org)
- As a spectroscopy analyzer, nondispersive infrared (NDIR) and Fourier transform infrared analyzers have been widely used because they operate consistently with low energy consumption compared to other spectroscopy technologies [ 1 ] . (encyclopedia.pub)
Development1
- Because hydrogen is the only neutral atom for which the Schrödinger equation can be solved analytically, the study of its energetics and chemical bonding has played a key role in the development of quantum mechanics. (wikipedia.org)
Protons5
- In the early universe, the formation of protons, the nuclei of hydrogen, occurred during the first second after the Big Bang. (wikipedia.org)
- The emergence of neutral hydrogen atoms throughout the universe occurred about 370,000 years later during the recombination epoch, when the plasma had cooled enough for electrons to remain bound to protons. (wikipedia.org)
- Hydrogen plays a particularly important role in acid-base reactions because these reactions usually involve the exchange of protons between soluble molecules. (wikipedia.org)
- In a hydrogen fuel cell, the anode's catalyst separates hydrogen molecules into protons and electrons, which take different paths to arrive at the cathode. (hklaureateforum.org)
- Meanwhile, the protons migrate through the electrolyte to the cathode, where they combine with oxygen and the electrons to produce water and heat. (hklaureateforum.org)
Lightest element1
- Hydrogen is the lightest element. (wikipedia.org)
Compounds7
- Most of the hydrogen on Earth exists in molecular forms such as water and organic compounds. (wikipedia.org)
- Hydrogen is nonmetallic (except when it becomes metallic at extremely high pressures) and readily forms a single covalent bond with most nonmetallic elements, forming compounds such as water and nearly all organic compounds. (wikipedia.org)
- In ionic compounds, hydrogen can take the form of a negative charge (i.e., anion) where it is known as a hydride, or as a positively charged (i.e., cation) species denoted by the symbol H+. (wikipedia.org)
- The H+ cation is simply a proton (symbol p) but its behavior in aqueous solutions and in ionic compounds involves screening of its electric charge by nearby polar molecules or anions. (wikipedia.org)
- The visible flames in the photographs were the result of carbon compounds in the airship skin burning. (wikipedia.org)
- However, it can condense into liquid form at very low temperatures (-423°F or -253°C). Elemental hydrogen is present in compounds such as water (H2O), ammonia (NH3), and hydrocarbons such as natural gas, coal and petroleum. (hklaureateforum.org)
- Together, these instruments were used to assay soils on Mars for biological activity, the presence of organic compounds, and the bulk elemental composition of soils. (researchgate.net)
Nitrogen1
- Combustion of hydrogen can lead to the thermal formation of nitrogen oxides. (wikipedia.org)
Exists in molecular1
- Hydrogen usually exists in molecular form (H2) and is non-toxic at room temperature and pressure. (hklaureateforum.org)
Hindenburg2
- The destruction of the Hindenburg airship was a notorious example of hydrogen combustion and the cause is still debated. (wikipedia.org)
- The most famous example of hydrogen application in history was Hindenburg[3], the hydrogen-powered airship that embarked on its maiden voyage on 4 March 1936 in Friedrichshafen, Germany, with 87 passengers and crews on board. (hklaureateforum.org)
Combustion3
- Hydrogen can be deployed as an energy source in fuel cells to produce electricity, or via combustion to generate heat. (wikipedia.org)
- Hydrogen gas (dihydrogen or molecular hydrogen) is highly flammable: 2 H2(g) + O2(g) → 2 H2O(l) (572 kJ/2 mol = 286 kJ/mol = 141.865 MJ/kg) The enthalpy of combustion is −286 kJ/mol. (wikipedia.org)
- After Burning , Technical, Engine, Combustion continued in internal combustion engine after exhaust ports opened. (icenergies.com)
Fossil fuel1
- Through the process of national strategic planning, governments over the world are expanding the development of hydrogen fuel and reducing fossil fuel consumption. (hklaureateforum.org)
Substance1
- Acid , Technical, General, A substance which forms hydrogen ions in solution which may be replaced by a metal to form salts. (icenergies.com)
Temperature2
- The hydrogen autoignition temperature, the temperature of spontaneous ignition in air, is 500 °C (932 °F). Pure hydrogen-oxygen flames emit ultraviolet light and with high oxygen mix are nearly invisible to the naked eye, as illustrated by the faint plume of the Space Shuttle Main Engine, compared to the highly visible plume of a Space Shuttle Solid Rocket Booster, which uses an ammonium perchlorate composite. (wikipedia.org)
- 148. Which one of the following physical quantities is the same for molecules of all gases at a given temperature? (dsguruji.com)
Chemical2
- Because hydrogen is the only neutral atom for which the Schrödinger equation can be solved analytically, the study of its energetics and chemical bonding has played a key role in the development of quantum mechanics. (wikipedia.org)
- In 1671, Robert Boyle, an Irish chemist, first discovered the chemical reaction between iron filings and dilute acids that produced hydrogen gas[2]. (hklaureateforum.org)
High1
- This has led to a high level of consumption and waste. (grin.com)
Environmental1
- This paper will conduct a comprehensive analysis, covering the prospect of production methods, conversion efficiency as well as storage and transportation of hydrogen fuel, along with the environmental impacts of production projects. (hklaureateforum.org)