Rank these systems in order of decreasing entropy.
Rank from highest to lowest entropy. To rank items as equivalent, overlap them.
A) 1 mol carbon tetrafluoride gas at 273k 40L
B) 1 mol krypton gas at 273K 40L
C) 1/2 mol krypton gas at 100k 20L
D) 1 mol krypton gas at 273K 20L
E) 1/2 mol krypton liquid at 100K
F) 1 mol fluorine gas 273 K 40L
G) 1/2 mol krypton gas at 273K 20L
Answer:
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The entropy is degree of disorderness, higher the disorderness higher the entropy.
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If two gas have same number of moles, then the gas with more number of atoms in a molecule will have higher entropy ( due to more number of macrostates)
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The smaller the volume the less the molecules can move around which also reduces the number of possible different states and hence less the entropy
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In a colder gas the molecules or atoms are not so energetic and so do not occupy so many different energetic states and hence will have less entropy .
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A liquid is more ordered than a gas, reducing its entropy.
So the order will be :
A > F > B> D > G > C > E