When NH4NO3(s) is dissolved in water the solution

When NH4NO3(s) is dissolved in water the solution that is formed is cold.a) For the process of dissolving NH4NO3(s) in water indicate for each of ?S ?H and ?G if the valueis negative zero or positive. Why?b) For each of ?Ssys ?Ssur and ?Suniverse indicate if the value is negative zero or positive. Why?