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i have a few questions dealing with calcium chloride and ammonia....can you help?
1)what volume of calcium chloride holds a pound of ammonia? (i really need a graph chart covering temprature /pressure)
2) does the electrical resistance of calcium chlride change as it becomes satureted with ammonia?
i really need some help with this....i have been unable to find any temp/pressure graph charts dealing with ammonia saturated calcium chloride. im in the process of trying to build a solar powered air conditioner with a bank of generator/absorber cells,an air cooled tower condensor, a large liquid ammonia reciever, an ammonia evaporator/glycol heat exchanger, and finally a gravity fed glycol/room ait heat exchanger.
yes, i am fammiliar with the dangerous pressures that will be generated. i know that ammonia is nasty stuff, and i understand basic thermodynamics (i install and fix air conditioners for a living)
i just need help with the chemistry end of the thing.
with gratitude,
Possum
ps.....please feel free to IM or email me (in my bio)
2 Answers
- RichardLv 71 decade agoFavorite Answer
The answers for your questions must be determined experimentally. I can only give you some theory behind the answer below.
Calcium chloride can react with ammonia gas to gaive a stable compound with the formula CaCl2*8NH3
This means one mole of Calcium chloride will adsorb 8 moles of Ammonia. This means that about 111 grams of anhydrous (bone dry) calcium chloride will adsorb 8 (17) = 136 grams of Ammonia.
136 g / 454 g/lb = 0.300 lb of Ammonia for about every 111 g / 454 g/lb = 0.25 pounds of dry Calcium chloride.
I am sure that the electrical resistance would change but you would need to take experimental readings to see how much.
A mixture of CaCl2 plus CaBr2 seem to be better for Ammonia storage, but may be more expensive.
Source(s): http://www.biocrawler.com/encyclopedia/Ammonia http://pubs.acs.org/cgi-bin/abstract.cgi/iecred/20... - Anonymous5 years ago
Did you mean to melt snow? If that is the case calcium chloride: (1) upon dissolution, evolves with intense heat therefore making it an effective ice-melting compound. (2) it is more effective at lower temperatures than sodium chloride.