heat of reaction NH3 with H2O

[djoko]

hi..
do anybody knows the heat of reaction released from this reaction at 298 K:
NH3 (l) + H2O (l) --> NH4OH
I know that NH4OH is not a stable condition,will be decomposized and NH3 n H2O are formed.I am trying to calculate from the heat of formation (Hf) every component but i got some problem. . from the books i read,i just got Hf of NH3 (vapour) n H2O (liquid).i can't find Hf of NH3 (l) and NH4OH

n maybe someone has/knows curve of heat of solution ammonia in water.i need it to calculate mass n energy balance in a tank
your comments are greatly appreciated..

regards

djoko

 

[25362]

From the CRC Handbook: -30.5 kJ/mol.