Ammonium nitrate dissolves in water via the following reaction:
NH4NO3(s) → NH4+(aq) + NO3-(aq)
The bond energies of the compounds in the reaction are as follows:
NH4NO3 = 3040 kJ/mol
NH4+ = 1564 kJ/mol
NO3- = 1009 kJ/mol
How much total energy does the reaction have, and how will the environment change when the reaction occurs? Please show all of your work for credit
First, remember that bond energies are good for calculating reactions that are in the gaseous state. Apparently the author expects us to ignore that so here goes.
dHrxn = BEreactants - BE products
dHrxn = 3040 kJ - (1564 kJ + 1009 kJ)
dHrxn = +467 kJ/mol so the surrounds get colder.