The Student Room Group

Chemical energetics

The enthalpy change of the neutralisation given below is –114 kJ mol–1.2NaOH(aq) + H2SO4(aq) Na2SO4(aq) + 2H2O(l) By using this information, what is the most likely value for the enthalpy change of the following neutralisation?

Ba(OH)2(aq) + 2HCl(aq) BaCl2(aq) + 2H2O(l)

A –57 kJ mol–1

B –76 kJ mol–1

C –114 kJ mol–1

D –228 kJ mol–1
Definition of the enthalpy change of neutralization: the energy released with the formation of 1 mole of water when neutralization takes place between an acid and a base.
Since both reactions yield the same number of moles of water, the answer should be C. Hope this makes sense :nyan:
Reply 2
Original post by Feeling Loki
Definition of the enthalpy change of neutralization: the energy released with the formation of 1 mole of water when neutralization takes place between an acid and a base.
Since both reactions yield the same number of moles of water, the answer should be C. Hope this makes sense :nyan:


My explanation was 'same number of moles for reactants and products.'
Thank you anyways! :tongue:

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