Which of the following result(s) in an increase in the entropy of the system?
I. condensation of a gas to a liquid
II. decreasing the volume of 1.0 mol of an ideal gas at constant temperature
III. dissolving sugar in water
IV. heating 1.0 mol of an ideal gas at constant volume
We’re being asked to which of the following result(s) in an increase in the entropy of the system.
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].
3. Mass: The greater the mass, then the greater the entropy.
Ex. Xe(g) [greater mass] has higher entropy than He(g).