Question

Rank these systems in order of decreasing entropy.

Rank from highest to lowest entropy. To rank items as equivalent, overlap them.

1 mol of
oxygen gas at
273 K and 40 L

1/2 mol of
xenon gas at
100 K and 20 L

1 mol of
xenon gas at
273 K and 20 L

1/2 mol of
liquid xenon
at 100 K

1 mol of
xenon gas at
273 K and 40 L

1 mol of
carbon tetrachloride gas at
273 K and 40 L

1/2 mol of
xenon gas at
273 K and 20 L

Answer 1

entropy is measure of disorderness , hence entropy of gas > entropy of liquid > entropy of solid

More molecules of gas present the higher will be entropy.

Entropy is higher when molar mass of molecule is higher or when more atoms present per molecule

Based on these

1 mol of Carbon tetrachloride gas at 273 K and 40 L  

1 mole Oxygen gas at 273 K and 40 L

1 mole of Xenon gas at 273 K and 40 L

1 mole of Xenon gas at 273 K and 20 L

1/2 mol Xenon gas at 273 K and 20 L

1/2 mol Xenon gas 100 K and 20 L

1/2 mol Xenon liquid at 100 K