Old Tires—A Clean Source of Energy

It s time to view old tires as an energy resource rather than an eyesore.  

Since H2 furnishes three times as much energy per gram as gasoline, only one-third as much liquid hydrogen is needed to furnish the same energy  

Since density = mass/volume, volume = mass/density, and the volume of H2(/) needed is 

To calculate the volume that this hydrogen would occupy as a gas at 1.00 atm and 25°C, we use the ideal gas law  

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