1 reply to this topic

[KS2010]

Hello friends,

I have already discussed this topic in Students forum and got partial help from Fatimah, thanks to her. However, I'm posting in this forum so that I can get some more detailed answers from experienced engineers.

When we dissoves ammonia gas (at 20 deg C and 1atm) into water the maximum possible concentration of ammonia into water is 32% i.e. 32kg ammonia gas will dissolve into 68kg of water to give 100kg of ammonical solution and this reaction is exothermic in nature.

It seems following reaction occurs [please correct me if I am wrong]

NH3 + H2O -----> NH4OH OR NH3 + H2O --------> NH4(+) + OH(-)


My questions:

1) What is the heat of reaction in kJ/mole ? How to calculate the heat of reaction for this reaction/s?

2) Since, I have explained above is practically true i.e. 32kg of ammonia in 68kg of water then, it does NOT match with this reaction as it comes out 32kg NH3 dissolves/reacts with 33.88kg of water to produce 65.88kg.


Any information and help will be hightly appreciated.

Thanks and regards,
KS

Edited by KS2010, 03 February 2010 - 05:18 PM.

[breizh]

Hi ,
Take a look at this link , it may support your query :
http://www.airgasspe...t.aspx?PID=1778
Hope it helps
Breizh