Question

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

What do you think and why?

Answer 2

I think the answer could be B because in order for a reaction to occur it must be a favored reaction

Answer 3

I agree and for that reason. D is the reverse for a true statement, the negative is true for c. A is true but doesn't go far enough but could be negative and dissolution could still take place.

Answer 4

b is right on apex