Question

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What must be true for a substance to dissolve in water?

A. The entropy term must be positive.
B. The enthalpy and entropy terms must combine for a favored reaction.
C. The free energy change of dissolving must be positive.
D. The energy required to break bonds apart must be greater than the energy released from the substance reacting with the solvent.

Answer 1

@Hoslos @sweetburger @rvc

Answer 2

I think either A. or B. As a would be always true as dissolving and solid will always increase the entropy. I am thinking it may be B because for all kinds of reaction if the DeltaH and DeltaS combine to be favorable negative Delta G/Free energy then the substance will dissolve.

Answer 3

As A would be always true as dissolving any solid will always increase entropy*

Answer 4

Just rewriting that sentence.

Answer 5

Yep it was B.

Answer 6

Ya i was thinking it was B.

Answer 7

thanks @sweetburger

Answer 8

Np np :)