Entropy Key Points and Definitions

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1. Entropy increases during the changes in state that give more randomness, for example

  • S is always a positive number
  • solid (low entropy --> gas (high entropy)
  • Decreases
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2. The more disorder there is in the system, the

  • S is always a positive number
  • Higher the entropy
  • Decreases

3. The standard entropy S, of a substance is

  • The entropy content of one mole of the substance under standard conditions
  • S is always a positive number

4. In calculations concerning ΔG= ΔH - TΔS 1, units must be the same for kJ/J

  • The units need to be the same, to convert ΔS to kJ K^-1 mol^-1 /1000
  • TΔS

5. All substances posess some degree of disorder because particles are in constant motion, thus

  • S is always a positive number
  • Decreases


Lizzie Keys

This is quite helpful but the answers are obvious when only one option makes sense. Hehe.

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