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https://session.rmasteringchemistry.com/myct itemView?assignmentProblem!D-68656639 General Chemistry VII (Flddler)-Section 2 Qualitative Predictions about Entropy Part A Rank these systems in order of decreasing entropy Rank from highest to lowest entropy. To rank items as equivalent, overlap then. Reset Help 112 mol of argon gas at 1 mol of arg n gas at 1/2 mol of 1 mol of 1 mol of argon gas at 273 K and 20L 1 mol of 1/2 mol of argon gas at 273 K and 20 L carbon disulfide gas at 273 K and 40 L oxygen gas at orygen gas at liquid argon 100 K and 20L 273 K and 40L 273 K and 40Lat 100 K Greatest entropy Least entropy The correct ranking cannot be determined

Explanation / Answer

The entropy is degree of disorderness, higher the disorderness higher the entropy.

To know the the entropy trend we have to remember that

1. 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)

so out of 1 mole of CCl4 , Cl2 and Argon ( same temperature and volume): CCl4 will have highest entropy followed by Cl2 and Argon.

3. The smaller number of molecules lesser the entropy

So 1 mole of Argon will have higher entropy then 1/2 moles of argon ( same volume and same temperature)

4.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 .

so 1/2 mole of argon gas at 273 K will have high entropy than that at 100 K

5. A liquid is more ordered than a gas, reducing its entropy.

So the overall order will be

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