Entropy Video Lessons

Concept

# Problem: Complete the following sentences on predicting the relative entropy of a system.The words are: decreases, equal to, increases, less than, greater than1. Temperature Changes: for a given substance, S° __________as the temperature increases.2. Physical States and Changes of State: as the freedom of motion of the substance  ____________ , the entropy increases. The size of the entropy change is such that ΔS°vap is much  ____________  ΔS°fus.3. Dissolving a Gas: when a gas dissolves in a liquid, the entropy always  ____________  but when dissolved in another gas it  ____________ .4. Dissolving a Solid or a Liquid: the entropy of a dissolved solid or liquid is always  ____________  the entropy of the pure substance.5. Atomic Size: the entropy of atoms generally  ____________  down a group since the number of microstates  ____________ .6. Molecular Complexity: the entropy of molecules  ____________  as they become more complex and the number of atoms  ____________ .

###### FREE Expert Solution

We're being asked to complete the following sentences on predicting the relative entropy of a system.

The words are: decreases, equal to, increases, less than, greater than

For Statement 1:

Recall that temperature is the average kinetic energy of gas molecules. This means increasing the temperature of a gas also increases the kinetic energy. Higher kinetic energy allows the gas molecules to move around more, which means there’s more chaos or disorder in the system.

Temperature Changes: for a given substance, S° increases as the temperature increases.

For Statement 2:

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###### Problem Details

Complete the following sentences on predicting the relative entropy of a system.

The words are: decreases, equal to, increases, less than, greater than

1. Temperature Changes: for a given substance, S° __________as the temperature increases.

2. Physical States and Changes of State: as the freedom of motion of the substance  ____________ , the entropy increases. The size of the entropy change is such that ΔS°vap is much  ____________  ΔS°fus.

3. Dissolving a Gas: when a gas dissolves in a liquid, the entropy always  ____________  but when dissolved in another gas it  ____________ .

4. Dissolving a Solid or a Liquid: the entropy of a dissolved solid or liquid is always  ____________  the entropy of the pure substance.

5. Atomic Size: the entropy of atoms generally  ____________  down a group since the number of microstates  ____________ .

6. Molecular Complexity: the entropy of molecules  ____________  as they become more complex and the number of atoms  ____________ .