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Bookmark or Share- Can a spark ignite hydrogen? - Chemistry Stack ExchangeActually hydrogen is not at all explosive. The mixture of hydrogen with oxygen (also air) is. As you know hydrogen is stored as liquid (high pressure cylinders) and it's perfectly stable. You can mix it with any amount of argon heat it as high as you want and nothing will happened.
- What fraction of hydrogen in air results in an explosive mixture?Hydrogen is explosive in mixtures in air at room temperature and ambient pressure when it is between 4% and 75% by volume. These limits are respectively called the "lower explosive limit" (LEL) and the upper explosive limit (UEL). Values for hydrogen (and many other gases) are provided in many locations on the internet.
- physical chemistry - What exactly is happening when sodium, potassium ...$\begingroup$ So it seems that as the reaction proceeds, the hydrogen pushes into the cracks and the increased surface area for the reaction produces even more hydrogen and heat, causing the cracks to expand rapidly in a feedback loop and leading to an explosion. This means there is thermal runaway, since more heat leads to higher rate of ...
- Why are peroxides explosive? - Chemistry Stack ExchangeLater engines utilized another important property of hydrogen peroxide for its decomposition until around 1980: the fact that it is a stronger oxidizer than chlorine/chloride. Thermodynamically we say the disproportionation is favorable since it has a fairly negative (~ -100 kJ/mol) enthalpy change and a considerable change in entropy ( ~ + 70 ...
- Safe explosion demonstrations - Chemistry Stack ExchangeSodium and Potassium are also good, though you may not always get an explosion, depending upon the available hydrogen above the metal. Which suggests... Hydrogen! This is the classic explosion in oxygen. In fact, on a small scale, the electrolysis of water into hydrogen and oxygen can be used to show that the mixture of these gases is very ...
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