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InterviewSolution
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oRa) Why enthalpy of neutralization of a strong acid and a strong base isalways constant e.g. 57.1 kJ mol for HCl and NaOH ? |
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Answer» The enthalpy of neutralization is constant for a strong acid and a strong base. The strong acid for example HCl is already in ionized form(in polar solvent like water) as H+ and Cl- ions Likewise, strong base like NaOH is also in ionized form as OH- ions and Na+ ions. When you mix them in standard concentrations, the Na+ ions and Cl- ions remain as ions in new mixture but H+ and OH- ions combine to form water. H+ And OH- gives H2O The formation of water is exothermic in nature and releases same amount of heat for any strong acod and base as the concentrations of H+ and OH- will be equal in standard concentrations. |
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