Practice Quiz

Praxis II General Science

Category - Physics

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Which of the following statements best describes the idea or theory of entropy?
  1. The amount of energy held within a molecule.
  2. The middle state, or equilibrium, of a system.
  3. A state of matter at 0 Kelvin.
  4. The energy required to activate a molecule.
  5. The randomness or disorder in a system.
Explanation
Answer: E - Entropy is best explained as the amount of randomness or disorder in a system. Basically, systems have a tendency to be disordered. High heat will diffuse, High energy will dissipate. Entropy is a measure of how disordered a system is. A box containing a lot of energy in a room full of no energy is low in entropy. That same amount of energy spread evenly through the room will have higher entropy.
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