A-LevelChemistryGroup 2May/June 2017Paper 4 Q113 Marks
The table lists the standard enthalpy changes of formation, ΔΗ, for some compounds and aqueous ions. ``` species ΔH_f/kJ mol⁻¹ Ba²⁺(aq) -538 OH⁻(aq) -230 CO₂(g) -394 BaCO₃(s) -1216 H₂O(l) -286 ```
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