Question

Exercises In this section similar exercises are paired. Spontaneity, Entropy, and the Second Law of Thermodynamics: Free Energy 25. Which of the following processes are spontaneous? a. Salt dissolves in H2O. b. A clear solution becomes a uniform color after a few drops of dye are added. c. Iron rusts. d. You clean your bedroom.

Answer 1

a)

salt will dissolve in water, therefore spontanoeus

b)

this is spontaneous, recall that ocncnetraiton in a liquid will be uniform, specially for a colored dye

c)

Iron will evnetually turn to "rusted iron", Fe2O3, as time passes by, therefore spontaneous

d)

not likely to be spontanoeus, requires will