Does the entropy increase, decrease, or stay the same for each of these processes?
1. Mixing
2. Sublimation
3. Purification
4. Separation
10 pts to whomever can get the correct answer for me!
Answer:
Entropy is the amount of randomness (or craziness) that occurs in a situation. For example 4 teenagers in a car has more entropy than one teenager.
1. More-the molecules go from an orderly solid structure, to a disorderly aqueous structure.
2. More-a solid has very little motion. A gas has very little order. So a gas will have more entropy than a solid.
3. Less- A pure substance is less random than a mixed substance
4. Less- it is now more orderly and separated
Entropy increases for all four processes because the second law of thermodynamics says that entropy increases in EVERY process.
Are you trying to get us to do your homework?!
The answers are:
1) Increases
2) Stays the same
3) Increases
4) Decreases
I agree with both you and Atticus. There's no need to be rude, but you should really read your book. Now, for the answer:
Think about spontaneity. Processes that occur spontaneously are usually associated to a positive entropy change.
Now, for Mr. Smartypants there, if entropy did in fact increase in every process, then thermodynamics would certainly be waaaay more simple. But it doesn't. That statement is only valid for an isolated system (such as the universe).
You see, by coupling processes you can make that a process that wouldn't normally occur actually happens, if the net entropy change of the coupled processes is positive.
Now think what happens spontaneously:
1. Mixing or seggregation?
2. Sublimation or deposition (or both)
and so on...
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