2

Would it increase the power of the jet engine due to heavier atoms being exhausted out the back?

For the same reason would it slow down an internal combustion engine?

Alex
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  • I thought jet engines burn kerosene, and hydrogen is more suited for rockets. – andselisk Aug 12 '17 at 03:54
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    @andselisk There are several hydrogen powered jets and cars that have been produced. – Alex Aug 12 '17 at 03:56
  • I guess you need to specify the exact types of engines you are talking about, and provide some references. I still cannot imagine a jet reaction engine using hydrogen (maybe you meant a turboshaft?), I must be living under a rock. Also, you might want to split the question in two as an internal combustion engine and a reaction engine have fundamentally different operating principles. – andselisk Aug 12 '17 at 04:12
  • Unfortunately I don't think it's possible to answer your question satisfactorily. Simply mentioning "What will happen..." is rather vague, for there are several things that could happen. – Pritt says Reinstate Monica Aug 12 '17 at 05:00
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    @Pritt Balagopal Its not very complicated I don't think. Deuterium is a hydrogen atom with double the mass. I just want to know what effect in theory that should have on an engine burning it. – Alex Aug 12 '17 at 05:18
  • Deuterium is not a gas. It is a isotope. Normally it comes as HD gas simply because Deuterium is rather rare is that what you mean. There is not much DD gas. – user2617804 Aug 12 '17 at 07:10
  • Its not very complicated I don't think. Deuterium is a hydrogen atom with double the mass. An extra neutron can change many things. An extra neutron made heavy water colorless, while normal water is very light blue. I just want to know what effect in theory that should have on an engine burning it. First of all, you must realize that engines are designed based on the fuel it uses. Using $\ce{D2}$ instead of $\ce{H2}$ can cause several problems, and you would need several books that explain the engines functioning to know why. There will be effects of course, just way too many effects. – Pritt says Reinstate Monica Aug 12 '17 at 07:28
  • related https://chemistry.stackexchange.com/questions/23831/would-there-be-a-difference-if-deuterium-is-embedded-instead-of-protium-regular – Mithoron Aug 12 '17 at 12:04
  • Possible duplicate of Chemical properties of isotopes – Mithoron Aug 12 '17 at 12:08
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    Very roughly there is nothing to gain. D2 will double the mass of the rocket while providing less energy content (D2 dissociation energy is higher than that of H2). – Alchimista Aug 12 '17 at 13:07
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    Sorry. You asked about jet or IC engines :)) but it should work the same. Momentum and energy counts, at least for jet. In IC again you have a heavier vehicle and less energy inside, you should both have littler acceleration and lower final attainable speed. – Alchimista Aug 12 '17 at 13:07

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