Question

Part A

Rank these systems in order of decreasing entropy.

Rank from highest to lowest entropy. To rank items as equivalent, overlap them

1/2 mol of
neon gas at
273 K and 20 L

1/2 mol of
liquid neon
at 100 K

1/2 mol of
neon gas at
100 K and 20 L

1 mol of
fluorine gas at
273 K and 40 L

1 mol of
neon gas at
273 K and 40 L

1 mol of
neon gas at
273 K and 20 L

1 mol of
carbon disulfide gas at
273 K and 40 L

Part B

Classify each process by its individual effect on the entropy of the universe, S.

a process run infinitesimally slowly at equilibrium and reversed to its original state

a constant composition mixture of solid and liquid water at STP (273.15 K and 1 atm)

motion of a frictionless pendulum

a bag of red marbles and a bag of green marbles dumped together on a table top

evaporation of water from a cup

isothermal expansion of a real gas

Part C

Predict the sign of ΔS for each process.

H2O(g)→2H3(g)+O2(g)

I2(g)→I2(s)

the sublimation of carbon dioxide