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The absolute enthalpy of neutralisation of the reaction
MgO(s) + 2HCl(aq) → MgCl₂(aq) + H₂O(l) will be
Options
(a) -57.33 kJ mol⁻¹
(b) greater then -57.33 kJ mol⁻¹
(c) less then -57.33 kJ mol⁻¹
(d) 57.33 kJ mol⁻¹
Correct Answer:
less then -57.33 kJ mol⁻¹
Explanation:
MgO is the oxide of weak base and we know that heat of neutralisation of 1 eq. of strong acid with strong base is -57.33 kJ/mol.
⇒ With weak base some heat is absorbed in dissociation of weak base.
⇒ Heat of neutralisation of weak base with strong acid will be – 57.33 kJ/mol.
Related Questions: - A solution with pH = 2 is more acidic then one with a pH = 6 , by a factor
- Reduction by LiAlH₄ of hydrolysed product of an ester gives
- By which of the following processes permanent hardness of water can be removed
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Topics: Thermodynamics
(179)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A solution with pH = 2 is more acidic then one with a pH = 6 , by a factor
- Reduction by LiAlH₄ of hydrolysed product of an ester gives
- By which of the following processes permanent hardness of water can be removed
- Which of the following pairs of substance on reaction will not evolve H₂ gas
- In which cell the free energy of a chemical reaction is directly converted into
Topics: Thermodynamics (179)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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