The heat of solution of ammonia in water at 1 atm is

(a) Calculate the enthalpy change that accompanies the dissolution of 200 mol of NH₃ in 400 mol of water at 25°C and 1 atm.

(b) If you actually bubbled 200 mol of ammonia at 25°C through 400 mol of water initially at 25°C and calculated the heat released in the process as Q = ΔH, why would Q not equal the value you calculated in Part (a)? (Give two reasons.)

Transcribed Image Text:

AH,(25°C, r = 2 mol H2O/mol NH3) = -78.2 kJ/mol