Question: In what way can Neutral triatomic hydrogen exist?
Answer: excited form

Question: How does nature produce H2?
Answer: expelling reducing equivalents in biochemical reactions

Question: How do labs produce H2?
Answer: by-product of other reactions

Question: What is an easy way to produce hydrogen?
Answer: electrolysis of water

Question: Where does the gaseous oxygen form at?
Answer: anode

Question: Where does the gaseous hydrogen form at?
Answer: cathode

Question: When you combine an alloy of alluminum and gallium to water, what do you get?
Answer: hydrogen

Question: What else can it produce?
Answer: alumina

Question: What can be reused after the formation?
Answer: the expensive gallium

Question: The most economical way to prepare hydrogen involves removing it from what?
Answer: hydrocarbons

Question: What temperature is needed for steam to react with methane?
Answer: 1000–1400 K, 700–1100 °C or 1300–2000 °F

Question: At what pressure does PSA work best in?
Answer: high pressures

Question: What is synthesis gas used for?
Answer: production of methanol

Question: Besides methane, what else can be used to produce synthesis gas?
Answer: Hydrocarbons

Question: How can it be recovered through steam?
Answer: use of carbon monoxide through the water gas shift reaction

Question: When hydrogen is generated from natural gas, what des it produce?
Answer: ammonia

Question: How is hydrogen produced as a co product?
Answer: Electrolysis of brine to yield chlorine

Question: What are the thermochemical cycyles in a testing phase for?
Answer: produce hydrogen and oxygen from water and heat without using electricity

Question: What are labs trying to produce hydrogen from?
Answer: solar energy and water

Question: What countries are testing this?
Answer: France, Germany, Greece, Japan, and the USA

Question: What condition is iron and steel alloys slowly oxidized?
Answer: anaerobic

Question: What does the anaerobic corrosion of iron lead to?
Answer: formation of ferrous hydroxide

Question: What is another name for formation of ferrous hydroxide?
Answer: green rust

Question: Under what condition can ferrous hydroxide be oxidized?
Answer: anaerobic

Question: What does this process form?
Answer: magnetite and molecular hydrogen

Question: What reaction describes this process?
Answer: Schikorr reaction

Question: How is hydrogen produced when there is no atmospheric oxygen?
Answer: serpentinization by the anaerobic oxidation

Question: Where do you find silicate?
Answer: crystal lattice of the fayalite

Question: What is the most common gas found in power tranformers?
Answer: hydrogen

Question: Where are large quantities of H2 needed?
Answer: petroleum and chemical industries

Question: What are the consumers of H2 in petrochemical plant?
Answer: hydrodealkylation, hydrodesulfurization, and hydrocracking

Question: Where is hydrogen highly soluble?
Answer: rare earth and transition metals

Question: Where can you find soluble hydrogen?
Answer: nanocrystalline and amorphous metals

Question: What influences hydrogens solubility in metals?
Answer: local distortions or impurities in the crystal lattice

Question: When are these useful?
Answer: when hydrogen is purified by passage through hot palladium disks

Question: When is it damaging?
Answer: gas's high solubility is a metallurgical problem, contributing to the embrittlement of many metals, complicating the design of pipelines and storage tanks

Question: Where else is H2 applied?
Answer: in physics and engineering

Question: How is H2 used in electrical generators at power stations?
Answer: as the rotor coolant

Question: Why is it used as the rotor coolant?
Answer: it has the highest thermal conductivity of any gas

Question: What research uses liquid H2?
Answer: cryogenic

Question: Why would one use hydrogen mixed with nitrogen?
Answer: as a tracer gas for minute leak detection

Question: What industries can you find these applications?
Answer: automotive, chemical, power generation, aerospace, and telecommunications

Question: How is hydrogen used as a food additive?
Answer: allows food package leak testing

Question: What isotope is used in nuclear fission?
Answer: Deuterium

Question: Where is tritium produced?
Answer: nuclear reactors

Question: What is tritium used for?
Answer: production of hydrogen bombs, as an isotopic label in the biosciences, and as a radiation source in luminous paints

Question: How is hydrogen used at power stations?
Answer: as a coolant in generators

Question: Why is it used as a coolant?
Answer: favorable properties that are a direct result of its light diatomic molecules

Question: What are these properties?
Answer: low density, low viscosity, and the highest specific heat and thermal conductivity of all gases

Question: Is Hydrogen considered an energy resource?
Answer: not

Question: Where does the sun get its energy from?
Answer: nuclear fusion of hydrogen

Question: How does hydrogen function when it s burned?
Answer: energy carrier

Question: What form of hydrogen has been discussed as a ussage for fuel?
Answer: elemental

Question: Why is hydrogen employed?
Answer: to saturate broken ("dangling") bonds of amorphous silicon and amorphous carbon that helps stabilizing material properties

Question: How is hydrogen used in oxide materials?
Answer: a potential electron donor

Question: What oxide materials use hydrogen as an electron donor?
Answer: ZnO, SnO2, CdO, MgO, ZrO2, HfO2, La2O3, Y2O3, TiO2, SrTiO3, LaAlO3, SiO2, Al2O3, ZrSiO4, HfSiO4, and SrZrO3

Question: What enzymes are used to produce H2?
Answer: hydrogenases

Question: When does hydrogen gas occur?
Answer: in the transfer of reducing equivalents produced during pyruvate fermentation to water

Question: What is the natural cycle of hydrogen production and consumption by organisms called?
Answer: hydrogen cycle

Question: What is the decomposition of water into its components called?
Answer: Water splitting

Question: Where does water splitting occur?
Answer: in the light reactions in all photosynthetic organisms

Question: What organisms can form H2 gas?
Answer: alga Chlamydomonas reinhardtii and cyanobacteria

Question: How are these gases formed?
Answer: by specialized hydrogenases in the chloroplast

Question: What threats can hydrogen cause to human saftey?
Answer: potential detonations and fires when mixed with air to being an asphyxiant in its pure, oxygen-free form

Question: What can hydrogen embrittlement lead to?
Answer: cracks and explosions

Question: What do physical and chemical properties of hydrogen depend on?
Answer: the parahydrogen/orthohydrogen ratio

Question: How long can it take to reach the equilibrium ratio?
Answer: days or weeks

Question: What do Hydrogen detonation parameters depend on?
Answer: container geometry

Question: What do people typically call a web browser?
Answer: browser

Question: What platform is a browser used on?
Answer: World Wide Web

Question: What does URL mean?
Answer: Uniform Resource Identifier

Question: What allows a person to direct their browser to a resource?
Answer: Hyperlinks

Question: The primary function of a browser is to use what?
Answer: the World Wide Web

Question: In addition to accessing the Internet, browsers can also access info that is put there by web servers in what?
Answer: private networks

Question: A browser can also access files where?
Answer: file systems

Question: When was the first browser created?
Answer: 1990

Question: Who invented the first browser?
Answer: Sir Tim Berners-Lee

Question: What was Berners-Lee a director of?
Answer: the World Wide Web Consortium

Question: What organization did Berners-Lee create?
Answer: World Wide Web Foundation

Question: Who released Mosaic?
Answer: Marc Andreessen

Question: When was Mosaic released?
Answer: 1993

Question: When Andreessen left the company he worked for, what new company did he start?
Answer: Netscape