Ammonium nitrate NH4NO3 is soluble in water at 25 C As NH4NO

Ammonium nitrate, NH4NO3, is soluble in water at 25 °C. As NH4NO3 dissolves, the solution becomes

appreciably colder (NH4NO3 is commonly used in instant cold packs). What are the signs of ΔH, ΔS, and ΔG for

the dissolution of NH4NO3 in water?

a) ΔH > 0, ΔS < 0, ΔG > 0

b) ΔH > 0, ΔS > 0, ΔG > 0

c) ΔH > 0, ΔS > 0, ΔG < 0

d) ΔH < 0, ΔS < 0, ΔG < 0

e) ΔH < 0, ΔS > 0, ΔG > 0

Answer is C - explanation will get points

Solution

c is correct.