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. Hydrogen gas forms explosive mixtures with air in concentrations from 4–74% and with chlorine at 5–95%. The explosive reactions may be triggered by spar… Web20 feb. 2015 · Hydrogen and helium atoms emerged a measly 379,000 years after the Big Bang. As the hot, dense plasma of protons, electrons and photons that was the universe began to cool and expand, electrons...

The Haber process - BBC Bitesize

Web16 sep. 2016 · 1 Answer. Iron on reaction with HCl forms Fe (II) salts and not Fe (III) salts because even if Fe (+3) is formed, as we can see in electrochemical series Fe (+2) will be favoured ie. H2 which gets can reduce Fe (+3) to Fe (+2). So thermodynamically Fe (+2) salt is favoured. If you want to make Fe (+3) salt then you can react Fe and Cl2 directly. Web1 nov. 2007 · The portable and safe storage of hydrogen will be fundamental to the exploitation of fuel cells for transport. Fuel cells are not new. They were invented in the … crystal the doll images

Why does combining hydrogen and oxygen typically produce …

Web1 apr. 2009 · 1838 The fuel cell effect, combining hydrogen and oxygen gases to produce water and an electric current, was discovered by Swiss chemist Christian Friedrich … Web1 apr. 2009 · 1776 Hydrogen was first identified as a distinct element by British scientist Henry Cavendish after he evolved hydrogen gas by reacting zinc metal with hydrochloric acid. In a demonstration to the Royal Society of London, Cavendish applied a spark to hydrogen gas yielding water. WebGasification is a process that converts organic or fossil-based carbonaceous materials at high temperatures (>700°C), without combustion, with a controlled amount of oxygen and/or steam into carbon monoxide, … crystal the beverage company trinidad