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GreenXenon
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 Posted: Sat Oct 11, 2008 4:08 am Post subject: Is an octaoxygen-dicyanoacetylene flame the hottest fire? |
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Hi:
I used to think dicyanoacetylene [C4N2] with ozone produces the
hottest fire. Now I>m not so sure.
Yes, C4N2 is the hottest burning fuel. However, the allotrope of
oxygen used is just as significant in determining the temperature of
the fire.
Allotropes of oxygen:
1. dioxygen, O2
2. ozone, O3
3. tetraoxygen, O4
4. octaoxygen, O8
If C4N2 is burnt with O2, the resulting flame will have a temperature
of 5260 K (4987 \260C, 9008 \260F). However, if 5260 K (4987 \260C,
9008 \260F). However, if C4N2 is burnt with O3, then the resulting
flame will have a temperature of 5516 K (5242.85 \260C, 9469.13
\260F). Is this due to O3 having more oxygen atoms than O2? If so,
would O8 and C4N2 generate the hottest flame? What temperature?
Thanks,
Radium |
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GreenXenon
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| Posted: Sat Oct 11, 2008 4:20 am Post subject: Re: Is an octaoxygen-dicyanoacetylene flame the hottest fire |
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On Oct 10, 9:08 pm, GreenXenon <glucege...@gmail.com> wrote:
[quote]If C4N2 is burnt with O2, the resulting flame will have a temperature
of 5260 K (4987 \260C, 9008 \260F). However, if 5260 K (4987 \260C,
9008 \260F). However, if C4N2 is burnt with O3, then the resulting
flame will have a temperature of 5516 K (5242.85 \260C, 9469.13
\260F). Is this due to O3 having more oxygen atoms than O2? If so,
would O8 and C4N2 generate the hottest flame? What temperature?
[/quote]
Please ignore the "/260" and other garbage.
It should read:
"If C4N2 is burnt with O2, the resulting flame will have a temperature
of 5260 K (4987 C, 9008 F). However, if 5260 K (4987 C, 9008 F).
However, if C4N2 is burnt with O3, then the resulting flame will have
a temperature of 5516 K (5242.85 C, 9469.13 F). Is this due to O3
having more oxygen atoms than O2? If so, would O8 and C4N2 generate
the hottest flame? What temperature?" |
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Bob1001
Guest
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| Posted: Sat Oct 11, 2008 4:43 am Post subject: Re: Is an octaoxygen-dicyanoacetylene flame the hottest fire |
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On Oct 11, 12:20 am, GreenXenon <glucege...@gmail.com> wrote:
[quote]On Oct 10, 9:08 pm, GreenXenon <glucege...@gmail.com> wrote:
If C4N2 is burnt with O2, the resulting flame will have a temperature
of 5260 K (4987 \260C, 9008 \260F). However, if 5260 K (4987 \260C,
9008 \260F). However, if C4N2 is burnt with O3, then the resulting
flame will have a temperature of 5516 K (5242.85 \260C, 9469.13
\260F). Is this due to O3 having more oxygen atoms than O2? If so,
would O8 and C4N2 generate the hottest flame? What temperature?
Please ignore the "/260" and other garbage.
It should read:
"If C4N2 is burnt with O2, the resulting flame will have a temperature
of 5260 K (4987 C, 9008 F). However, if 5260 K (4987 C, 9008 F).
However, if C4N2 is burnt with O3, then the resulting flame will have
a temperature of 5516 K (5242.85 C, 9469.13 F). Is this due to O3
having more oxygen atoms than O2? If so, would O8 and C4N2 generate
the hottest flame? What temperature?"
[/quote]
So far you have randomly posted about this "hottest fire bla bla bla"
3 times. You should try a news group that is into organic chemistry.
Bob |
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aruzinsky
Guest
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| Posted: Sat Oct 11, 2008 4:25 pm Post subject: Re: Is an octaoxygen-dicyanoacetylene flame the hottest fire |
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On Oct 10, 10:08 pm, GreenXenon <glucege...@gmail.com> wrote:
[quote]Hi:
I used to think dicyanoacetylene [C4N2] with ozone produces the
hottest fire. Now I>m not so sure.
Yes, C4N2 is the hottest burning fuel. However, the allotrope of
oxygen used is just as significant in determining the temperature of
the fire.
Allotropes of oxygen:
1. dioxygen, O2
2. ozone, O3
3. tetraoxygen, O4
4. octaoxygen, O8
If C4N2 is burnt with O2, the resulting flame will have a temperature
of 5260 K (4987 \260C, 9008 \260F). However, if 5260 K (4987 \260C,
9008 \260F). However, if C4N2 is burnt with O3, then the resulting
flame will have a temperature of 5516 K (5242.85 \260C, 9469.13
\260F). Is this due to O3 having more oxygen atoms than O2? If so,
would O8 and C4N2 generate the hottest flame? What temperature?
Thanks,
Radium
[/quote]
What is the temperature of aluminimum, magnesium, or zirconium burning
in allotropes of
oxygen? |
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Richard Casady
Guest
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| Posted: Sat Oct 11, 2008 8:59 pm Post subject: Re: Is an octaoxygen-dicyanoacetylene flame the hottest fire |
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On Fri, 10 Oct 2008 21:20:27 -0700 (PDT), GreenXenon
<glucegen1x@gmail.com> wrote:
[quote]"If C4N2 is burnt with O2, the resulting flame will have a temperature
of 5260 K (4987 C, 9008 F). However, if 5260 K (4987 C, 9008 F).
However, if C4N2 is burnt with O3, then the resulting flame will have
a temperature of 5516 K (5242.85 C, 9469.13 F). Is this due to O3
having more oxygen atoms than O2? If so, would O8 and C4N2 generate
the hottest flame? What temperature?"
[/quote]
Ozone yields energy when it decomposes. You don>t mention plain O.
What do you think you get when ozone decomposes? one O, one O2.
Two O can then combine to make an O2, yielding more energy. As far as
I know there is no O4 or O8. I got A>s in college chem courses, but
what would I know.
Casady |
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N:dlzc D:aol T:com (dlzc)
Guest
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| Posted: Sat Oct 11, 2008 9:53 pm Post subject: Re: Is an octaoxygen-dicyanoacetylene flame the hottest fire |
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Dear Richard Casady:
"Richard Casady" <richardcasady@earthlink.net> wrote in message
news:490ecc52.438735781@news.east.earthlink.net...
....
[quote]As far as I know there is no O4 or O8. I got A>s in
college chem courses, but what would I know.
[/quote]
Never a good idea to argue from authority, when you present
yourself as an authority.
.... here is some humble pie for you...
http://www.nationmaster.com/encyclopedia/Allotropes-of-oxygen
http://www.bbc.co.uk/dna/h2g2/A5759517
http://www.smso.net/Solid_oxygen
(and was the shits finding reputable links amongst the wikis and
snake oil salesmen, not surprised you had not yet heard about
this in a believeble way)
David A. Smith |
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Kelly
Guest
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| Posted: Sun Oct 12, 2008 7:32 am Post subject: Re: Is an octaoxygen-dicyanoacetylene flame the hottest fire |
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GreenXenon wrote:
[quote]If C4N2 is burnt with O2, the resulting flame will have a temperature
of 5260 K (4987 \260C, 9008 \260F). However, if 5260 K (4987 \260C,
9008 \260F). However, if C4N2 is burnt with O3, then the resulting
flame will have a temperature of 5516 K (5242.85 \260C, 9469.13
\260F). Is this due to O3 having more oxygen atoms than O2? If so,
would O8 and C4N2 generate the hottest flame? What temperature?
[/quote]
The flame temperature of a reaction is simply a function of the heats of
formation of the reactants and products, and the heat capacity of the
products. Look these up, and you>ll understand why the flame temp is
what it is.
Kelly |
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Andrew Usher
Guest
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| Posted: Mon Oct 13, 2008 3:08 am Post subject: Re: Is an octaoxygen-dicyanoacetylene flame the hottest fire |
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On Oct 11, 10:25 am, aruzinsky <aruzin...@general-cathexis.com> wrote:
[quote]What is the temperature of aluminimum, magnesium, or zirconium burning
in allotropes of oxygen?
[/quote]
Zirconium would be by far the best of the three as its gaseous oxide
has
a high stability (its solid oxide is the most refractory as well). Zr,
Hf, Th
still wouldn>t quite match C4N2 as the latter is an endothermic
compound.
Andrew Usher |
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Andrew Usher
Guest
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| Posted: Mon Oct 13, 2008 3:09 am Post subject: Re: Is an octaoxygen-dicyanoacetylene flame the hottest fire |
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On Oct 11, 10:53 am, "N:dlzc D:aol T:com \(dlzc\)" <dl...@cox.net>
wrote:
[quote]As far as I know there is no O4 or O8. I got A>s in
college chem courses, but what would I know.
Never a good idea to argue from authority, when you present
yourself as an authority.
[/quote]
O4 and O8 have never been stably isolated. So O3 does indeed
give the hottest practical flame.
Andrew Usher |
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aruzinsky
Guest
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| Posted: Mon Oct 13, 2008 4:54 pm Post subject: Re: Is an octaoxygen-dicyanoacetylene flame the hottest fire |
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On Oct 12, 9:08 pm, Andrew Usher <k_over_hb...@yahoo.com> wrote:
[quote]On Oct 11, 10:25 am, aruzinsky <aruzin...@general-cathexis.com> wrote:
What is the temperature of aluminimum, magnesium, or zirconium burning
in allotropes of oxygen?
Zirconium would be by far the best of the three as its gaseous oxide
has
a high stability (its solid oxide is the most refractory as well). Zr,
Hf, Th
still wouldn>t quite match C4N2 as the latter is an endothermic
compound.
Andrew Usher
[/quote]
Years ago, there was a brand of camera flash bulb that contained
zirconium instead of magnesium. |
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