Question 251482

A) In a chemical reaction 2 moles of solid decomposes to form one mole of gas. Would you expect TriangleS to be positive, negative, or close to zero for this reaction?

  • TriangleS for this reaction should be positive.

1) In which of the processes described below should the entropy increase? Choose all of the correct possibilities.

a) ice cubes melting at -5 degrees Celsius and 1 atm pressure

b) water disappearing from a tea kettle by boiling away

c) gas sprayed onto a cold surface deposits (solidifies) and becomes part of the surface

d) dissolution of sugar in a hot cup of coffee

e) some dry ice left on a tabletop disappearing via sublimation