
Michael A. answered 04/05/19
Michael - The Astrophysicist!
Okay. Here is the answer : There would be no reaction. This is because Ammonium Nitrate is a salt -an ionic compound for that matter- with the formula NH4NO3 and liquid nitrogen has the formula N2. The Ammonium Nitrate would not dissolve in the liquid Nitrogen because the Ammonium Nitrate which is the solute has ionic bonds in it but the liquid Nitrogen has induced dipole-induced dipole forces. So there would be no interaction between the solute particles(NH4NO3) and the solvent particles (N2). Simply put the solute (NH4NO3) is polar and the solvent (N2) is non-polar and so there wouldn't be any dissolution and thus no reaction.
Remember the rule for dissolution : Like dissolves like. Polar solute dissolves in polar solvent and non polar solutes dissolve in non-polar solvents.
I hope this helps!