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Hydrazine is an inorganic compound with the chemical formula N 2 H 4. It is a simple pnictogen hydride , and is a colourless flammable liquid with an ammonia -like odour. Hydrazine is highly hazardous unless handled in solution as, for example, hydrazine hydrate ( N 2 H 4 · x H 2 O ).
This is a list of common chemical compounds with chemical formulae and CAS numbers, indexed by formula. This complements alternative listing at list of inorganic compounds. There is no complete list of chemical compounds since by nature the list would be infinite.
The main purpose of chemical nomenclature is to disambiguate the spoken or written names of chemical compounds: each name should refer to one compound. Secondarily, each compound should have only one name, although in some cases some alternative names are accepted. Preferably, the name should also represent the structure or chemistry of a compound.
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It is a gas at room temperature (298 K, 25 °C, 77 °F). It also has a lifetime in excess of 1 μs, though it is predicted to be characterized as metastable. [7] Due to its instability, the N 4 molecule readily disassociates into two more-stable N 2 molecules. This process is very exothermic, releasing around 800 kJ mol −1 of energy. [7]
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In thermochemistry, a thermochemical equation is a balanced chemical equation that represents the energy changes from a system to its surroundings. One such equation involves the enthalpy change, which is denoted with Δ H {\displaystyle \Delta H} In variable form, a thermochemical equation would appear similar to the following: