Entropy Video Lessons

Concept

# Problem: Arrange the following set of systems in order of increasing entropy. Assume one mole of each substance and the same temperature for each member of a set.H2(g), HBrO4(g), HBr(g)

###### FREE Expert Solution

We’re being asked to rank the given compounds in order of increasing entropy at 25 ˚C

The given compounds are: H2(g), HBrO4(g), HBr(g)

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).

100% (385 ratings)
###### Problem Details

Arrange the following set of systems in order of increasing entropy. Assume one mole of each substance and the same temperature for each member of a set.

H2(g), HBrO4(g), HBr(g)