Notice that we have to break 2 bonds, the weak bond binding the last phosphoryl group and a comparatively strong H-OH bond (which requires 493.4 kJ/mol). Will these bonds break spontaneously or do you need to add energy to the system in order to break the bonds

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.