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Martin - マーチン
Martin - マーチン
9:15 AM
@orthocresol What a garbage answer to that comment!
 
 
2 hours later…
Bounty Hunter
Bounty Hunter
10:57 AM
-1
Q: Calorific value of a gas in combustion

pasaba por aquiWikipedia says [see here]: The calorific value [...] may be expressed with the quantities: energy/mole of fuel (1) energy/mass of fuel (2) energy/volume of the fuel (3) My question is: is the energy obtained by the combustion mainly proportional to the mass of the gas, being then values...

gas-laws heat combustion
 
 
1 hour later…
Martin - マーチン
Martin - マーチン
12:14 PM
“Energy/mole of fuel” is not a quantity; it’s a mixture of quantities and units. The correct quantity would be “energy per amount of fuel” or $E/n$, which could be expressed in J/mol. — Loong ♦ 1 hour ago
 
 
5 hours later…
Zhe
Zhe
5:33 PM
@orthocresol Interesting. How stable is it?
 
orthocresol
orthocresol
5:44 PM
Afaik it seems to keep okay in the freezer although I don't know what's the longest time we've ever kept it for (we made new batches fairly regularly)
 
Zhe
Zhe
I guess it's going to form the diradical pretty easily
 
Mithoron
Mithoron
6:02 PM
@Zhe It's surprisingly stable. Up to more then 100 C
Because of charge-shift bond maybe
These a bit less strained propellanes are actually less stable, so it's kinda exception
 
Zhe
Zhe
@Mithoron That reminds of some some labmate I used to work with
He had some record for most nitrogenated organic compound (with some other qualifiers)
Said it was very explosive if you set it off but remarkably stable
Good time to remember that the Hammond postulate doesn't carry over between different reactions :)
 
Mithoron
Mithoron
6:18 PM
@Zhe Check out these really unstable ;)
Next propellane decomposed about 50 K iirc :D
 
Zhe
Zhe
@Mithoron Good luck trying to draw a linear trend from that one :)
 
Mithoron
Mithoron
:p
 
Mithoron
Mithoron
6:32 PM
@Zhe Still this over 100 C was with 5 min. lifetime :D
So not that stable ;D But really room temp. stable so not bad ;)
 

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