Marcela dissolves 80.0 g of ammonium nitrate in 50.0 mL of water at room temperature and notes that the temperature of the solution decreases by 5.0°C.

Which correctly designates the signs of changes of G, S and H for this reaction?

3 answers

Do you have thoughts on this? It seems obvious to me that delta H is +.
NH4NO3(s) + H2O ==> NH4NO3(aq) - heat
choices

A. H>0, S>0 , G<0
B. H<0, S>0 , G<0
C. H>0, S>0 , G>0
D. H<0, S<0 , G>0
https://answers.yahoo.com/question/index?qid=20091202141141AAzWAa6

Answers are not in the same order but you get the full explanation here.