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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?

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closed as too broad by Pritt Balagopal, Jan, andselisk, airhuff, Mithoron Aug 12 '17 at 12:08

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  • $\begingroup$ I thought jet engines burn kerosene, and hydrogen is more suited for rockets. $\endgroup$ – andselisk Aug 12 '17 at 3:54
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    $\begingroup$ @andselisk There are several hydrogen powered jets and cars that have been produced. $\endgroup$ – Alex Aug 12 '17 at 3:56
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    $\begingroup$ @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. $\endgroup$ – Alex Aug 12 '17 at 5:18
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    $\begingroup$ 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). $\endgroup$ – Alchimista Aug 12 '17 at 13:07
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    $\begingroup$ 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. $\endgroup$ – Alchimista Aug 12 '17 at 13:07

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