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Topics related to "hydrogen"

hydrogenation
hydrogenation , chemical reaction of a substance with molecular hydrogen, usually in the presence of a catalyst. A common hydrogenation is the hardening of animal fats or vegetable oils to make them solid at room temperature and improve their stability. Hydrogen is added (in the presence of a nickel... Read more
hydrogen
hydrogen [Gr.,=water forming], gaseous chemical element; symbol H; at. no. 1; at. wt. 1.00794; m.p. -259.14°C; b.p. -252.87°C; density 0.08988 grams per liter at STP; valence usually +1. The Isotopes and Forms Atmospheric hydrogen is a mixture of three isotopes . The most common ... Read more
hydrogen sulfide
hydrogen sulfide chemical compound, H 2 S, a colorless, extremely poisonous gas that has a very disagreeable odor, much like that of rotten eggs. It is slightly soluble in water and is soluble in carbon disulfide. Dissolved in water, it forms a very weak dibasic acid that is sometimes called hydros... Read more
hydrogen peroxide
hydrogen peroxide chemical compound, H 2 O 2 , a colorless, syrupy liquid that is a strong oxidizing agent and, in water solution, a weak acid. It is miscible with cold water and is soluble in alcohol and ether. Although pure hydrogen peroxide is fairly stable, it decomposes into water and oxygen w... Read more
hydrogen bomb
hydrogen bomb or H-bomb, weapon deriving a large portion of its energy from the nuclear fusion of hydrogen isotopes. In an atomic bomb , uranium or plutonium is split into lighter elements that together weigh less than the original atoms, the remainder of the mass appearing as energy. Unlike... Read more
Periodic Table of the Elements: Hydrogen
Periodic Table of the Elements: Hydrogen Periodic Table of the Elements: Hydrogen Atomic Number: 1 Atomic Symbol: H   Hydrogen Atomic Weight: 1.00794 Electron Configuration: 1 ... Read more
methyl
methyl , CH 3 , organic free radical or alkyl group derived from methane by the removal of one hydrogen atom. ... Read more
bicarbonate
bicarbonate or hydrogen carbonate, chemical compound containing the bicarbonate radical, -HCO 3 . The most familiar of such compounds is sodium bicarbonate (baking soda). See carbonate . ... Read more
ethyl
ethyl , CH 3 CH 2 , organic free radical or alkyl group derived from ethane by removing one hydrogen atom. ... Read more
phenyl
phenyl , C 6 H 5 , organic free radical or alkyl group derived from benzene by removing one hydrogen atom. ... Read more

Encyclopedia entries related to "hydrogen"

Hydrogen Chloride
Encyclopedia entry from: The Gale Encyclopedia of Science Hydrogen Chloride Hydrogen chloride is a chemical compound composed of the elements hydrogen and chlorine. It dissolves readily in water to produce a solution called hydrochloric acid. Both substances have many important industrial applications...
Hydrogen
Encyclopedia entry from: UXL Encyclopedia of Science Hydrogen Hydrogen is the simplest of all chemical elements. It is a colorless, odorless...C ( − 434.7 ° F), of all elements. An atom of hydrogen contains one proton and one electron, making it the simplest atom that...
hydrogen
Book article from: The Columbia Encyclopedia, Sixth Edition hydrogen [Gr.,=water forming], gaseous chemical...1. The Isotopes and Forms Atmospheric hydrogen is a mixture of three isotopes . The most...ion) is a proton. A second isotope of hydrogen is deuterium (mass no. 2, atomic mass...
Hydrogen Peroxide
Encyclopedia entry from: The Gale Encyclopedia of Science Hydrogen Peroxide Hydrogen peroxide, H 2 O 2 , is a colorless liquid that mixes with water...slowly to form water and oxygen gas. Highly concentrated solutions of hydrogen peroxide are powerful oxidizing agents and can be used as rocket...
hydrogen chloride
Book article from: The Columbia Encyclopedia, Sixth Edition hydrogen chloride chemical compound, HCl, a colorless...liquid is a poor conductor of electricity. Hydrogen chloride is prepared commercially by the...sometimes used in place of sulfuric acid. Hydrogen chloride is also produced as a byproduct...
hydrogen fluoride
Book article from: The Columbia Encyclopedia, Sixth Edition hydrogen fluoride chemical compound, HF, a colorless, fuming...sulfuric acid. Hydrofluoric acid is a water solution of hydrogen fluoride; hydrofluoric acid containing 35.35% hydrogen fluoride by weight is an azeotrope with a constant...
Potassium Hydrogen Tartrate
Encyclopedia entry from: The Gale Encyclopedia of Science Potassium Hydrogen Tartrate Potassium hydrogen tartrate is an acid salt of tartaric acid. It is denoted...carbon, 51.01% oxygen, 20.78% potassium, and 2.68% hydrogen, and has a density of 1.95 g/cc. When purified, it...
hydrogen bomb
Book article from: The Columbia Encyclopedia, Sixth Edition hydrogen bomb or H-bomb, weapon deriving a large...its energy from the nuclear fusion of hydrogen isotopes. In an atomic bomb , uranium...energy. Unlike this fission bomb, the hydrogen bomb functions by the fusion, or joining...
hydrogen peroxide
Book article from: The Columbia Encyclopedia, Sixth Edition hydrogen peroxide chemical compound, H 2 O 2...soluble in alcohol and ether. Although pure hydrogen peroxide is fairly stable, it decomposes...usually acetanilide, is often added to it. Hydrogen peroxide has many uses. It is available...
hydrogen cyanide
Book article from: The Columbia Encyclopedia, Sixth Edition hydrogen cyanide HCN, colorless, volatile, and...acid. Its salts are called cyanides . Hydrogen cyanide may be synthesized directly from...from coal and is recovered (along with hydrogen sulfide) from coke-oven exhaust gases...

Dictionary entries related to "hydrogen"

hydrogen bond
Book article from: A Dictionary of Zoology hydrogen bond The force of attraction (the hydrogen force) that exists between polar molecules containing hydrogen atoms, or between one part of a molecular chain and another part that contains bonded hydrogen. It occurs because the single electron...
hydrogen
Book article from: A Dictionary of Astronomy hydrogen (symbol H) The most abundant chemical element in the Universe, comprising some 73 % of its mass. Hydrogen is found in several forms: molecular hydrogen , H 2 , the most familiar form on Earth, occurs in dense...
Hydrogen Bomb
Dictionary entry from: Dictionary of American History HYDROGEN BOMB HYDROGEN BOMB, a type of nuclear weapon, also known as the "superbomb...the fusion of the nuclei of light elements, typically isotopes of hydrogen. Physicists recognized the fusion or thermonuclear reaction as the...
hydrogen carrier
Book article from: A Dictionary of Biology hydrogen carrier ( hydrogen acceptor ) A molecule that accepts hydrogen atoms or ions, becoming reduced in the process (see oxidation–reduction ). The electron transport system, whose function is to generate energy in the form of...
hydrogen emission region
Book article from: A Dictionary of Astronomy hydrogen emission region A region in interstellar space containing hot hydrogen gas which emits a characteristic red spectral line...is the brightest line in the optical spectrum of hydrogen, and is known as the H} α (hydrogen...
hydrogen ion
Book article from: A Dictionary of Astronomy hydrogen ion A hydrogen atom that has gained or lost an electron, and thus has an electric charge. The positive hydrogen ion, H + , has lost its only electron and therefore consists of a...
hydrogen burning
Book article from: A Dictionary of Astronomy hydrogen burning A series of nuclear reactions in which hydrogen nuclei (protons) fuse to form a helium nucleus, with...stars with core temperatures below about 18 million K, hydrogen burning occurs primarily through the proton–...
hydrogen ‘burning’
Book article from: A Dictionary of Earth Sciences hydrogen ‘burning’ A thermonuclear...produces energy by the combination of hydrogen nucleii, and referred to in stellar evolution...The stage ends when the inner core of hydrogen is exhausted, causing the contraction...
hydrogen spectrum
Book article from: A Dictionary of Astronomy hydrogen spectrum A distinctive pattern of spectral lines, either emission or absorption, produced by hydrogen, the simplest of all the atoms. The series of lines in the spectrum are labelled according to the lowest energy level involved in...
hydrogen bomb
Book article from: The Oxford Essential Dictionary of the U.S. Military hydrogen bomb H-bomb an immensely powerful bomb in which hydrogen nuclei combine to form helium nuclei and release energy in an uncontrolled self-sustaining fusion reaction.

Thesaurus entries related to "hydrogen"

model
Book article from: The Oxford American Writers Thesaurus ...prototype is an early, usually unrefined version of something that later versions reflect but may depart from (a prototype for a hydrogen-fueled car). Paradigm can refer to an example that serves as a model, but today its use is primarily confined to a grammatical...

Related newspaper, magazine, and trade journal articles from HighBeam Research

Hydrogen-pinch analysis made easy: an automated spreadsheet method can quickly help minimize fresh hydrogen consumption while maximizing hydrogen recovery and reuse in petroleum refineries and petrochemical complexes.(Engineering Practice)
Magazine article from: Chemical Engineering; 6/1/2008; ; 700+ words ; ...and petrochemical complexes, there are many hydrogen consumers, such as hydrotreaters, hydrocrackers...isomerization units and lubricant plants. There are also hydrogen producers, such as hydrogen plants and naphtha reformers. Through a systematic...
Hydrogen: the next generation: cleaning up production of a future fuel.
Magazine article from: Science News; 10/12/2002; ; 700+ words ; ...fossil fuel, but many people predict that hydrogen will fuel the future--in ears, houses...countless handheld electronic devices. Hydrogen-powered fuel cells (SN: 9/7/02...fuel-free future: The main source of hydrogen at the moment is the hydrocarbon molecules...
Hydrogen -- a little PR.(benefits of using hydrogen as an alternative fuel)
Magazine article from: Whole Earth; 12/22/2001; ; 700+ words ; You've probably heard something about hydrogen. On the positive side, the PR says hydrogen is the ideal fuel for cars, homes, and...major car companies are intensely researching hydrogen technology for the next generation of vehicles...
The "hydrogen economy": many environmentalists are pushing hydrogen fuel as an energy source because of hydrogen's abundance. But though hydrogen is abundant, it is also mainly impractical.(ENERGY)
Magazine article from: The New American; 8/20/2007; ; 700+ words ; ...The Rime of the Ancient Mariner The "hydrogen economy" is a Green dream. Environmentalists...the visible matter in the universe is hydrogen and that our oceans have an inexhaustible supply of hydrogen atoms. Moreover, they point out, hydrogen...
Hydrogen technologies to meet refiners' future needs. (includes related article) (Fuels Management)
Magazine article from: Hydrocarbon Processing; 2/1/1995; ; 700+ words ; ...fuels, there will be an increase in hydrogen demand and refiners will be required to find new sources of hydrogen. Offgas sources within refineries may...portion of these requirements, but more hydrogen will be needed than can be economically...
Hydrogen Car Research, Development Efforts Accelerate -- Perhaps Too Quickly.
Newspaper article from: Knight Ridder/Tribune Business News; 12/10/2003; 700+ words ; ...Business News Dec. 10--The start of the hydrogen-car revolution has, in just a few...bolts reality. The first pieces of the "hydrogen highway" across California, a proposal...Orange County. The county is home to a hydrogen-power research center at the University...
Hydrogen dreams: Hopevs. hype
Newspaper article from: Daily Breeze; 6/12/2005; ; 700+ words ; ...transportation experts are betting that hydrogen will eventually power most cars, while...and disadvantages: Question: What is hydrogen, and where does it come from? Answer...supplies cannot be exhausted. But hydrogen is not actually a fuel, and can be used...
Hydrogen Power International, Inc. Subsidiary Hydrogen Power, Inc. Announces Successful Conversion of Ford Ranger Truck to Run On Hydrogen.
Business Wire; 6/7/2006; 700+ words ; ...amp; WEST PALM BEACH, Fla. -- Hydrogen Power International, Inc. (Pink Sheets...announced today that its subsidiary, Hydrogen Power, Inc. ("HPI"), has successfully...internal combustion engine vehicle to a hydrogen hybrid, ultimately to be powered by...
Hydrogen Technologies: Are Advancements Robust Enough to Deliver on Hydrogen's Immense Potential?
Newspaper article from: PR Newswire Europe; 12/21/2004; 700+ words ; ...motivating the energy community to investigate hydrogen as a compelling alternative fuel. While hydrogen continues to pose significant challenges...different stages of commercial development. Hydrogen is being regarded as a promising candidate...
Hydrogen Highway: Oxnard site tests BMW dual-fuel vehicles.
Newspaper article from: Ventura County Star (Ventura, CA); 9/24/2006; 700+ words ; Byline: Allison Bruce Sep. 24--The hydrogen-powered BMW in the rearview mirror might...center has been charged with testing two BMW Hydrogen 7 prototypes, which run on both hydrogen and gasoline, using a dual-fuel engine...