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?

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

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  2. 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

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

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