Sciencemadness Discussion Board
Not logged in [Login ]
Go To Bottom

Printable Version  
Author: Subject: ozone combustion
liljoe086
Harmless
*




Posts: 7
Registered: 28-5-2007
Member Is Offline

Mood: No Mood

[*] posted on 12-6-2007 at 15:06
ozone combustion


Does the combustion of O3 with H yield a higher energy than with O2? And if so by what factor.
View user's profile View All Posts By User
12AX7
Post Harlot
*****




Posts: 4803
Registered: 8-3-2005
Location: oscillating
Member Is Offline

Mood: informative

[*] posted on 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




Seven Transistor Labs LLC http://seventransistorlabs.com/
Electronic Design, from Concept to Layout.
Need engineering assistance? Drop me a message!
View user's profile Visit user's homepage View All Posts By User This user has MSN Messenger
DerAlte
National Hazard
****




Posts: 779
Registered: 14-5-2007
Location: Erehwon
Member Is Offline

Mood: Disgusted

[*] posted on 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
View user's profile View All Posts By User

  Go To Top