Please help me with these Chemistry questions.

Question

For each of the following, does entropy increase or decrease?

1. Gold jewelry is melted down
2. The dry ice sublimes as the package of frozen goods is shipped
3. Frost forms over the lawn from the humid evening
4. Wax from a candle solidifies after the flame is extinguished
5. The water in the puddle quickly turns to vapor on a warm afternoon

The system below is at equilibrium. Which direction will equilibrium shift when carbon dioxide is removed from the system?

a. to the right

b. no shift will occur

c. to the left

Answer 1

Entropy increases going from solid to liquid to gas. So a solid has less entropy than a liquid, and a liquid has less entropy than a gas. (Memorize this).

1. Gold jewelry is melted down - entropy increases (went from solid to liquid)
2. The dry ice sublimes as the package of frozen goods is shipped - entropy increases (solid to gas)
3. Frost forms over the lawn from the humid evening - entropy decreases (liquid to sold)
4. Wax from a candle solidifies after the flame is extinguished - entropy decreases (liquid to solid)
5. The water in the puddle quickly turns to vapor on a warm afternoon - entropy increases (liquid to gas)

According to Le Chatelier, the equilibrium will shift to the left (answer C).