Recall that entropy is the degree of chaos or disorder of a system and that it depends on the following:
1. Phase: The gas phase has the highest entropy, followed by the liquid, and then the solid phase with the lowest entropy.
Gas > Liquid > Solid
2. Complexity: More elements in the compound leads to higher entropy.
Ex. NO3(g) [4 elements] has higher entropy than NO2(g) [3 elements].
Arrange these gases in order of decreasing standard molar entropy:
Rank from largest to smallest.
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