Why does a log of wood not burn by a match stick but a paper does? Why is hydrogen not used as a fuel in automobile?
Answers
Answer:
because H2 is much lighter gas so it easily escape
Answer:
A substance starts burning when it reaches its ignition temperature.
Since paper has a lower ignition temperature than a log of wood it can be burned by a matchstick, but a log of wood needs more energy to reach its ignition temperature and hence cannot be burned by a matchstick.
Hydrogen burns without any color to indicate a fire. This becomes a problem refueling your vehicle, because the slightest leak at the nozzle can catch fire without any notice. You don’t refuel by simply putting the nozzle in the filler tube. There has to be a better than an airtight seal made first, then an air purge of the fill hose, and after the fill a purge of hydrogen in the fill hose before you can disconnect. So it cannot be used as a fuel for automobiles.