Statement 1: Heat evolved in the neutralization of either 1 mole of HCl or 1 mole of H 2 SO 4 with NaOH is same. Statement 2: Both, HCl and H 2 SO 4 are strong acids.

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Chemistry - Thermochemistry Question with Solution | TestHub

ChemistryThermochemistryEnthalpy of NeutralisationMedium2 minQB

ChemistryMediumstatement

Statement 1: Heat evolved in the neutralization of either 1 mole of HCl or 1 mole of H₂SO₄ with NaOH is same.

Statement 2: Both, HCl and H₂SO₄ are strong acids.

Options:

Answer:

Solution:

With sufficient NaOH, 1 mol of HCl supplies 1 mol of H^⁺ and releases about 57.1 kJ. In contrast, 1 mol of H_₂SO_₄ supplies 2 mol of H^⁺ and releases about 2 × 57.1 = 114.2 kJ. Since the heats released are not the same, Statement 1 is incorrect. Both acids are strong, meaning they are fully ionized in dilute solutions, so Statement 2 is correct. The answer is (d).

Stream:JEESubject:ChemistryTopic:ThermochemistrySubtopic:Enthalpy of Neutralisation

⏱ 2mℹ️ Source: QB

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