The standard enthalpies of the formation of ions in aqueoussolutions are obtained by arbitrarily assigning a value of zero toH ions; that is, ΔHof [H+(aq)] = 0.
(a) For the following reaction
HCl(g) H+(aq) + Cl−(aq) ΔHorxn= −74.9 kJ/mol
calculate ΔHof for the Cl− ions.
___kJ/mol
(b) Given that ΔHoffor OH− ions is −229.6 kJ/mol, calculate theenthalpy of neutralization when 1 mole of a strong monoprotic acid(such as HCl) is titrated by 1 mole of a strong base (such as KOH)at 25°C.
___ kJ/mol
The standard enthalpies of the formation of ions in aqueous solutions are obtained by arbitrarily assigning a value of z
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