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

  • S is always a positive number
  • Decreases

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

  • solid (low entropy --> gas (high entropy)
  • Decreases
  • S is always a positive number

8. The more disorder there is in the system, the

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

9. Entropy ______ when a solid lattice dissolves

  • Increases
  • Decreases
  • S is always a positive number

10. In a reaction where there is an increase in the number of gaseous molecules, entropy

  • Increases
  • ΔSºreaction = ΣSº(products) - ΣSº(reactants)
  • Decreases

11. If a change makes a system more random ΔH is positive, and if a change makes a system more ordered, ΔS is

  • Negative
  • ΔSºreaction = ΣSº(products) - ΣSº(reactants)

12. The standard entropy change of a reaction can be calculated using the standard entropies of the reactants and products:

  • ΔSºreaction = ΣSº(products) - ΣSº(reactants)
  • The entropy content of one mole of the substance under standard conditions

13. 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