In article , John Woodgate wrote:
I read in sci.electronics.design that Don Klipstein
wrote (in ) about 'CB Radios,
Cellphones and Gasoline Vapor Ignition', on Tue, 23 Mar 2004:
That one is up there, but let's check heat of formation...

HF gas: 63.991 KCal/mole, 3.19955 KCal/gram

MgO: 145.76 KCal/mole, 3.644 KCal/gram, but with no gaseous output.

Do you have the figures for CsF?

No I don't. I expect it to be more per mole and less per gram than HF.

I do have a figure for RbF, 133.31 KCal/mole, 1.276 KCal/gram.

But another one that ranks high per gram is Al2O3.
That one gets 389..49 KCal per mole, 3.818 KCal per gram, and 2.45% more
if you get it to be corundum crystal rather than amorphous powder.

B2O3 gets 279.81 KCal per mole, 3.886 KCal per gram.

I think BeO is also up there, probably even more per gram, but I do not
have that figure. I suspect it is the champ in energy per gram of
reactants, and misremembered by one element in the same column since
MgO is not the champ after all.

DON'T TRY THIS AT HOME.(;-)

- Don Klipstein )