Chemistry 9701 · AS & A Level · Chemical energetics

Chemical energetics — practice question

In the table below, '+’ shows that this kind of standard enthalpy change can only take positive values, ‘-’ shows that this kind of standard enthalpy change can only take negative values, ‘+/-’ shows that both positive and negative values are possible. Which row is correct?

  • Aatomisation: $+$; formation: $+$; solution: $\pm$
  • Batomisation: $+$; formation: $\pm$; solution: $\pm$
  • Catomisation: $-$; formation: $\pm$; solution: $-$
  • Datomisation: $-$; formation: $-$; solution: $+$

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