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Topic: ENDOTHERMIC CHEMICALS  (Read 3163 times)

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Offline rome561

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ENDOTHERMIC CHEMICALS
« on: April 21, 2016, 10:32:41 AM »
please help provide a list of endothermic chemicals that are stronger than ammonium nitrate and the hazards please. I am in desperate need of this list.
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Offline mikasaur

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Re: ENDOTHERMIC CHEMICALS
« Reply #1 on: April 21, 2016, 10:36:02 AM »
Not sure what you mean. There are endothermic reactions but there are no chemicals that are endothermic all on their own.

Maybe you should explain what it is you're trying to do. You may also need to read our forum rules. We're about helping you learn to learn, not about giving you answers.
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Or you could, you know, Google it.

Offline rome561

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Re: ENDOTHERMIC CHEMICALS
« Reply #2 on: April 21, 2016, 10:45:14 AM »
Quote from: mikasaur on April 21, 2016, 10:36:02 AM
Not sure what you mean. There are endothermic reactions but there are no chemicals that are endothermic all on their own.

Maybe you should explain what it is you're trying to do. You may also need to read our forum rules. We're about helping you learn to learn, not about giving you answers.

I am not looking for answers specifically. I just wanted to be pointed in the right direction. I have been doing research on this topic for about 7 months and I can not come up with anything. I NEED HELP on finding chemicals that mix with either water or another chemical that gives off a stronger endothermic reaction than ammonium nitrate, FOR A PROJECT
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Offline Arkcon

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Re: ENDOTHERMIC CHEMICALS
« Reply #3 on: April 21, 2016, 02:58:23 PM »
What you're looking for is chemicals with a negative heat of solution.  You can Google that term for more options.  We can help more, if you give us some more specifics.  Briefly, however, if you're expecting something easy, or remotely practical, you should prepare for disappointment  right now.  And you can stop yelling whenever you feel like it.
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Hey, I'm not judging.  I just like to shoot straight.  I'm a man of science.

Offline Enthalpy

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Re: Chemicals with a negative heat of solution
« Reply #4 on: April 22, 2016, 06:34:36 AM »
CRC Handbook of Chemistry and Physics, "Enthalpy of soluton for some common electrolytes", kcal/mol

 6.14   NH4NO3
 8.00   NH4ClO4 (less dangerous than the nitrate)
 8.83   AgNO2 (how stable?)
10.06   N(CH3)4I
10.41   KMnO4
12.20   KClO4
and some more using Rb, Cs, IO3 and BrO3.

You should have a look at polyols like erythritol, pentaerythritol, xylitol and glycerine. Safe, cheap. In kJ/g from:
Low-Calorie Foods and Food Ingredients by R. Khan, paragraph 3.3.1

 99     Erythritol
153     Xylitol

Please double-check the units from other sources.
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Offline rome561

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Re: ENDOTHERMIC CHEMICALS
« Reply #5 on: April 24, 2016, 12:11:03 AM »
the last reply was probably the only valuable help, I appreciate that very much, thank you
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Offline mikasaur

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Re: ENDOTHERMIC CHEMICALS
« Reply #6 on: April 24, 2016, 12:40:27 PM »
Quote from: rome561 on April 24, 2016, 12:11:03 AM
the last reply was probably the only valuable help, I appreciate that very much, thank you

Ouch.
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Or you could, you know, Google it.

Offline Enthalpy

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Re: ENDOTHERMIC CHEMICALS
« Reply #7 on: April 24, 2016, 09:02:18 PM »
Ouch indeed, that could have been more delicate. Even more so because neither had I understood the query before others had managed to make it clearer.
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Offline mikasaur

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Re: ENDOTHERMIC CHEMICALS
« Reply #8 on: April 26, 2016, 02:11:29 PM »
It's all good.

While I still have you here, I thought it was kind of fun that while Googling around about endothermic reactions and a potential answer to OP's question I found this thread. It looks like Enthalpy has been cheating on us! And didn't even bother to change his avatar! :P
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Or you could, you know, Google it.

Offline Enthalpy

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Re: ENDOTHERMIC CHEMICALS
« Reply #9 on: April 26, 2016, 05:28:22 PM »
Gasp, he found me! Yes, I put there what isn't chemistry.
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