Actually, gasoline has to be atomized in order to burn properly.
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To burn most efficiently, yes. But as a foolish teenage given the task of burning our trash in the burn barrel, I can assure you, it burns REALLY WELL, just about any way you try to combine the liquid and flame.
I also know, that a paper sack full of trash will launch from a 55 gallon drum flaming garbage spread over ~20’ radius if allowed to set long enough to first evaporate enough of the liquid.
My only experience with H2 was in my high school Chemistry class. My Chemistry teacher formed soap bubbles with O2 and H2 in his hand. About the size of a baseball.
He then instructed us to open our mouths (to even the shock wave pressure on our ear drums) and lit the handful of foamy bubbles. Easily one of the loudest explosions I have ever experienced. Louder than my 357 and I could feel the heat/shock-wave against my face. Probably close to when the national park service fired off a civil war cannon at the Vicksburg National Park. Lol.
The thing about gasoline is that it burns in a flame versus explodes. Seems like the quicker you can get something to consume its energy, means a greater force. And dispersing the fuel amongst the surrounding oxygen, means a greater yield.
H2 is already in gas form and with a little pressure behind it, mixes well with air although it might rise quickly since it is more buoyant than air. Gasoline is contained within the gas tank even when the gas cap is removed.
On the other hand, if the H2 disperses quickly enough, it is less of a threat. That is why FAE Bombs work well in a contained area like caves and tunnels.
Disclaimer: I am no expert and I could be wrong. Just makes sense. :)