When a solute spontaneously dissolves in a liquid, the process is often exothermic. NH4NO3, however, spontaneously dissolves in water endothermically and is thus used in cold packs. Which is TRUE about the dissolution of NH4NO3? a.The ΔH of the process is zero. b.The ΔG of the process is positive. c.The increase in entropy during dissolution outweighs the positive change in enthalpy. d.The ΔS of the process is negative.

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