I know that explosions create shock by rapidly expanding the volume of something.  Chemical explosives typically convert a solid or liquid to a gas that has a much higher volume than the original solid or liquid.  Nukes pump heat energy into their surroundings (earth air water etc.) causing their surroundings to vaporize and/or expand rapidly.  Propellants, on the other hand do the same thing only a bit more slowly so the force of the expansion can be directed to a certain task.

My question is this: What volume are we talking about?  How much gas does a stick of dynamite produce, for example?  How much “extra” volume of air did the Hiroshima bomb produce, for example?  For propellants, I’d be curious to find out what volume of gas a standard .38 or .22 round might produce (or you could go to the metric sized rounds if they are easier to come up with).

I poked around on the web but did not find what I needed.  Sources tended not to mention volume at all, or were filled with mathmatics and jargon that I did not understand.

Really I don’t need this for any pressing reason, I’m just curious.  So don’t sweat any bullets (so to speak).