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6. 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

7. 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

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

  • S is always a positive number
  • Decreases

9. In calculations concerning ΔG= ΔH - TΔS entropy is worked out using K

  • To convert C to K add 273 and the opposite to convert K to C
  • The entropy change that accompanies a reaction in the molar quantities as expressed in a chemical equation under standard conditions, all in standard states

10. Entropy ______ when a solid lattice dissolves

  • S is always a positive number
  • Increases
  • Decreases

11. 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

12. Standard entropy change of reaction, ΔSº, is

  • The entropy change that accompanies a reaction in the molar quantities as expressed in a chemical equation under standard conditions, all in standard states
  • S is always a positive number

13. The free energy change ΔG is

  • The balance between enthalpy, entropy, and temperature for a process: ΔG = ΔH - TΔS
  • The entropy change that accompanies a reaction in the molar quantities as expressed in a chemical equation under standard conditions, all in standard states