liljoe086 - 12-6-2007 at 15:06
Does the combustion of O3 with H yield a higher energy than with O2? And if so by what factor.
12AX7 - 12-6-2007 at 18:55
1.4 or so?
Certainly oughta. Probably even spontaneous.
I don't know exactly offhand, but I know how I would find it, and you can find it the same way: look up the heat of formation of O3 and compare it to
that of O2. Then look up the heat of O2 + 2 H2 --> 2 H2O, and adjust for the stoichiometry of ozone (multiply by 3/2 because there are two O's in
the above and three in O3 + 3 H2 --> 3 H2O). Then add the O2 > O3 heat of formation quantity and you have your answer in quantity. To get your
answer by factor, divide.
In essence, you are solving for the amount of energy that ozone contains, on top of the energy of ordinary O2 + H2 combustion. So the factor
corresponds to the amount of energy in O3 expressed in terms of heat of combustion. Now that I think of it, the factor may be more like 1.1 (i.e.,
10% more energy).
Tim
DerAlte - 13-6-2007 at 18:37
19.7% more:
From CRC enthalpy tables.
2O3 --> 3O2 + 2x143 KJ = 246 KJ
3O2+6H2 --> 6H2O + 6x242 KJ + 1452 KJ
So 2O3+6H2 --> 6H2O + 1738 KJ;
(1738/1452)X100 = 119.7
DerAlte