If 3 moles of a compound use 12 J of energy in a reaction, what is the A Hreaction in kJ/mol?
O A. 0.004 kJ/mol
O B. 4 kJ/mol
O C. -4 kJ/mol
O D. -0.004 kJ/mol

4.25g sample of solid ammonium nitrate dissolves in 60.0g of water in a coffee-cup calorimeter, the temperature drops from 22.0 c to 16.9 c. assume that the specific heat of the solution is the same as that of pure water. calculate delta(h) (in kj/mol nh4no3) for the solution proces.