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#1
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Evaporation point for Ammonia?
Dear All,
I opened the fuming chamber, and I didn't see any change after 12 hours. I think it might be because it is too cold in the garage. It is about 0ºC (freezing) in the garage today. I DAGS, but all the MSDS sheets I found for ammonia don't have the evaporation point listed. I know we have a few chemists here, does anyone know the evaporation point for ammonia? Thanks, David. Every neighbourhood has one, in mine, I'm him. Remove the "splinter" from my email address to email me. Newbies, please read this newsgroups FAQ. rec.ww FAQ http://www.robson.org/woodfaq/ Archives http://groups.google.com/advanced_group_search Crowbar FAQ http://www.klownhammer.org/crowbar |
#2
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Evaporation point for Ammonia?
"David F. Eisan" writes:
Dear All, I opened the fuming chamber, and I didn't see any change after 12 hours. I think it might be because it is too cold in the garage. It is about 0ºC (freezing) in the garage today. I DAGS, but all the MSDS sheets I found for ammonia don't have the evaporation point listed. -33.4°C (1013 hPa) -- Dr. Juergen Hannappel http://lisa2.physik.uni-bonn.de/~hannappe Phone: +49 228 73 2447 FAX ... 7869 Physikalisches Institut der Uni Bonn Nussallee 12, D-53115 Bonn, Germany CERN: Phone: +412276 76461 Fax: ..77930 Bat. 892-R-A13 CH-1211 Geneve 23 |
#3
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Evaporation point for Ammonia?
It is LOW. Just use it. They use it as a refrigerant since it is the
cheapest and most effective found yet. On Sun, 09 Nov 2003 19:14:01 GMT, "David F. Eisan" wrote: Dear All, I opened the fuming chamber, and I didn't see any change after 12 hours. I think it might be because it is too cold in the garage. It is about 0ºC (freezing) in the garage today. I DAGS, but all the MSDS sheets I found for ammonia don't have the evaporation point listed. I know we have a few chemists here, does anyone know the evaporation point for ammonia? Thanks, David. Every neighbourhood has one, in mine, I'm him. Remove the "splinter" from my email address to email me. Newbies, please read this newsgroups FAQ. rec.ww FAQ http://www.robson.org/woodfaq/ Archives http://groups.google.com/advanced_group_search Crowbar FAQ http://www.klownhammer.org/crowbar |
#4
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Evaporation point for Ammonia?
"David F. Eisan" wrote in
ble.rogers.com: I know we have a few chemists here, does anyone know the evaporation point for ammonia? -28 degrees F. |
#5
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Evaporation point for Ammonia?
On Sun, 09 Nov 2003 19:14:01 GMT, "David F. Eisan"
wrote: I know we have a few chemists here, does anyone know the evaporation point for ammonia? 0°C You'll be working with a dilute aqueous solution, and if that freezes, then it ain't going to happen... I've also found that the reaction is annoyingly slow over Winter. I fume in daylight, rather than my usual leaving it overnight. A little heat might not hurt either - try a small lightbulb or cabinet heater. -- Die Gotterspammerung - Junkmail of the Gods |
#6
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Evaporation point for Ammonia?
In article , Murray Peterson
wrote: "David F. Eisan" wrote in ble.rogers.com: I know we have a few chemists here, does anyone know the evaporation point for ammonia? -28 degrees F. The more important question is the rate of reaction of the ammonia with your wood. Generally speaking chemical reactions are slowed by *about* a factor of 2 per 10 degrees Celsius. So your instincts are correct, its probably the low temperature that's the problem, not because of the vapor pressure of the ammonia but because of the slower rate of reaction with the wood. Wait until you have warmer weather. -- Vince Heuring To email, remove the Vince. |
#7
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Evaporation point for Ammonia?
Partial pressure of the ammonia is also affected by the lower temperature
(vapor pressure) of the water, isn't it? Which law is that, Henry's? "Vince Heuring" wrote in message om... The more important question is the rate of reaction of the ammonia with your wood. Generally speaking chemical reactions are slowed by *about* a factor of 2 per 10 degrees Celsius. So your instincts are correct, its probably the low temperature that's the problem, not because of the vapor pressure of the ammonia but because of the slower rate of reaction with the wood. Wait until you have warmer weather. -- Vince Heuring To email, remove the Vince. |
#8
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Evaporation point for Ammonia?
In article , Vince
Heuring wrote: Wait until you have warmer weather. LOL! That means MAY! djb -- There are no socks in my email address. "Quando Omni Flunkus Moritati" |
#9
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Evaporation point for Ammonia?
"David F. Eisan" wrote in message
ble.rogers.com... Dear All, I opened the fuming chamber, and I didn't see any change after 12 hours. I think it might be because it is too cold in the garage. It is about 0ºC (freezing) in the garage today. I DAGS, but all the MSDS sheets I found for ammonia don't have the evaporation point listed. I know we have a few chemists here, does anyone know the evaporation point for ammonia? Thanks, David. Every neighbourhood has one, in mine, I'm him. Remove the "splinter" from my email address to email me. Newbies, please read this newsgroups FAQ. rec.ww FAQ http://www.robson.org/woodfaq/ Archives http://groups.google.com/advanced_group_search Crowbar FAQ http://www.klownhammer.org/crowbar David, It seems highly unlikely to me that you have "ammonia" at all to worry about. More likely you have a bottle of reagent grade ammonium hydroxide. If so, you aren't merely dealing with evaporation temperature but with how quickly this solution is freeing ammonia into the atmosphere under the tent.. But you will probably have to either raise the temperature substantially (10-15 degrees C would be my guess) or be willing to wait a very long time. At even 0C ammonia must be kept under high pressure for it to remain liquid. Did your ammonia come in a highly pressurized cylinder with dire warnings all over it or in a bottle? -- John McGaw [Knoxville, TN, USA] Return address will not work. Please reply in group or through my website: http://johnmcgaw.com |
#10
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Evaporation point for Ammonia?
David the evaporation point isn't what you should be asking about.
It is the vapor pressure of the ammonia/water solution that is biting you in the butt. A solution of 30% ammonia has a room temp (25°C) vapor pressure of approx 1 atmosphere. Below room temp the VP is lower than 1atm and less and less ammonia will evaporate the colder the solution is. There are 2 fixes to your problem. Heat the ammonia solution or use a stronger solution. For more than you ever wanted to know on this subject see http://www.ammoniapro.com/Ammonia%20...%20Ammonia%20I nfo%20Manual%20-LaRoche.pdf Page 21 has the VP vs Temp chart. HTH. Art "David F. Eisan" wrote in message ble.rogers.com... Dear All, I opened the fuming chamber, and I didn't see any change after 12 hours. I think it might be because it is too cold in the garage. It is about 0ºC (freezing) in the garage today. I DAGS, but all the MSDS sheets I found for ammonia don't have the evaporation point listed. I know we have a few chemists here, does anyone know the evaporation point for ammonia? Thanks, David. Every neighbourhood has one, in mine, I'm him. Remove the "splinter" from my email address to email me. Newbies, please read this newsgroups FAQ. rec.ww FAQ http://www.robson.org/woodfaq/ Archives http://groups.google.com/advanced_group_search Crowbar FAQ http://www.klownhammer.org/crowbar |
#11
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Evaporation point for Ammonia?
Hello there,
It seems highly unlikely to me that you have "ammonia" at all to worry about. More likely you have a bottle of reagent grade ammonium hydroxide. If so, you aren't merely dealing with evaporation temperature but with how quickly this solution is freeing ammonia into the atmosphere under the tent.. But you will probably have to either raise the temperature substantially (10-15 degrees C would be my guess) or be willing to wait a very long time. I am using 26% ammonium hydroxide solution. I have shut the garage door, and I will run the heater tonight to keep the garage at 10-15ºC. Come morning, I will use the remote opener for the garage and let the air clear before going in. Thanks everyone for the help, David. |
#12
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Evaporation point for Ammonia?
There is no temperature dependancy in Henry's Law.
I'm pretty sure. -JBB "George" wrote in message ... Partial pressure of the ammonia is also affected by the lower temperature (vapor pressure) of the water, isn't it? Which law is that, Henry's? "Vince Heuring" wrote in message om... The more important question is the rate of reaction of the ammonia with your wood. Generally speaking chemical reactions are slowed by *about* a factor of 2 per 10 degrees Celsius. So your instincts are correct, its probably the low temperature that's the problem, not because of the vapor pressure of the ammonia but because of the slower rate of reaction with the wood. Wait until you have warmer weather. -- Vince Heuring To email, remove the Vince. |
#13
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Evaporation point for Ammonia?
You're right, but the concentration/partial pressure terms (dissolved vs.
gaseous) ARE temperature dependent. "J.B. Bobbitt" wrote in message m... There is no temperature dependancy in Henry's Law. I'm pretty sure. -JBB "George" wrote in message ... Partial pressure of the ammonia is also affected by the lower temperature (vapor pressure) of the water, isn't it? Which law is that, Henry's? "Vince Heuring" wrote in message om... The more important question is the rate of reaction of the ammonia with your wood. Generally speaking chemical reactions are slowed by *about* a factor of 2 per 10 degrees Celsius. So your instincts are correct, its probably the low temperature that's the problem, not because of the vapor pressure of the ammonia but because of the slower rate of reaction with the wood. Wait until you have warmer weather. -- Vince Heuring To email, remove the Vince. |
#14
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Evaporation point for Ammonia?
I tried fuming my quarter sawn white oak table a few days ago at 72 degrees.
Nothing happened, so I even waited overnight (mid 60s) and still not much visible change. I was rather disappointed. I used Ammonium Hydroxide 28%. Poured about a pint of it into a glass baking dish. Most of it was evaporated by morning. Any suggestions? -- Trent Tidmore |
#15
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Evaporation point for Ammonia?
On Sun, 09 Nov 2003 23:52:18 +0000, David F. Eisan wrote:
Hello there, It seems highly unlikely to me that you have "ammonia" at all to worry about. More likely you have a bottle of reagent grade ammonium hydroxide. If so, you aren't merely dealing with evaporation temperature but with how quickly this solution is freeing ammonia into the atmosphere under the tent.. But you will probably have to either raise the temperature substantially (10-15 degrees C would be my guess) or be willing to wait a very long time. I am using 26% ammonium hydroxide solution. I have shut the garage door, and I will run the heater tonight to keep the garage at 10-15ºC. Come morning, I will use the remote opener for the garage and let the air clear before going in. Thanks everyone for the help, David. Ahhhh, I can't wait to see a pic of David with a Canuckistani "tan" :-) -Doug |
#16
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Evaporation point for Ammonia?
On Sun, 09 Nov 2003 16:37:15 -0600, Dave Balderstone
scribbled In article , Vince Heuring wrote: Wait until you have warmer weather. LOL! That means MAY! David E. is in the Southern Ontario banana belt, so it might mean April. ;-) Luigi Replace "no" with "yk" twice in reply address for real email address |
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