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An important extensive property of all systems in thermodynamics, statistical mechanics, and information theory, quantifying their disorder (randomness), i.e., our lack of information about them. It characterizes the degree to which the energy of the system is *not* available to do useful work.

1 vote
1 answer
420 views

Why does a temperature increase on a fixed volume increase entropy?

The number of possible microstates is still the same, so isn't the entropy constant? …
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5 votes
3 answers
21k views

Can ice have a higher entropy than water?

I've leant that entropy is a state of randomness, and that solids have a more structured form, therefore having less entropy. … However, I saw a YouTube comment stating the following: a liquid NOT ALWAYS means higher entropy than a solid it depends...of the context for example, in the south pole, ice means higher entropy
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4 votes
3 answers
2k views

Does entropy really always increase (or stay the same)? [duplicate]

While unlikely, wouldn't this mean that entropy decreases? …
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