What is meant by standard enthalpy change of neutralisation, $\Delta H_{\text{neut}}^{\ominus}$?
- A$\Delta H_r^{\ominus}$ when one mole of an aqueous acid is neutralised by an aqueous alkali
- B$\Delta H_r^{\ominus}$ when one mole of an aqueous alkali is neutralised by an aqueous acid
- C$\Delta H_r^{\ominus}$ when one mole of an aqueous acid is neutralised by one mole of an aqueous alkali
- D$\Delta H_r^{\ominus}$ when an aqueous acid and an aqueous alkali react together to produce one mole of water