Entropy

The second  law of thermodynamics states that entropy of a system  tends to ______________. 

• increase

• decrease

• stay constant

• fluctuate wildly

Entropy is a measure of a system's

• potential energy

• thermal density

• specific heat

• disorder

All of these are examples of increasing entropy except...

• basketball leaking air

• making ice cubes in the freezer

• leaves falling from a tree

• dissolving salt crystals in water

Delta S is negative indicates

• enthalpy increases

• enthalpy decreases

• entropy decreases

• entropy increases

In terms of entropy, why is it easier to mix two substances than to separate them once mixed?

• Mixing increases the energy of the system

• Mixing decreases the energy of the system

• Mixing increases the disorder of the system

• Mixing decreases the disorder of the system

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DOK Level 2: Skill/Concept

Entropy of a system increases when a reaction increases the number of particles.

• True

• False

Which of the following is an example of entropy decreasing in a system?

• A cup of coffee cooling down

• A room becoming messier over time

• Water freezing into ice

• A car engine running

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DOK Level 2: Skill/Concept

Entropy always increases when

• enthalpy decreases.

• temperature decreases.

• temperature increases.

• volume increases.

Entropy is a measure of

• accuracy

• precision

• the disorder of a system

• the attraction of a nucleus for an electron

Which of the following scenarios is an example of increasing entropy in everyday life?

• Organizing a bookshelf

• Melting ice cream on a hot day

• Freezing water into ice cubes

• Compressing a gas into a smaller volume

Tags

DOK Level 2: Skill/Concept