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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: - If active mass of a 6% solution of a compound is 2, its molecular weight will be
- The values of heat of formation of SO₂ and SO₃ are -298.2 kJ and -98.2 kJ.
- The molecular weight of a gas is 45. Its density at STP is
- Cannizzaro reaction is not given by
- The reaction of chloroform with ethylamine in alcoholic alkali gives
Topics: Thermodynamics
(179)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If active mass of a 6% solution of a compound is 2, its molecular weight will be
- The values of heat of formation of SO₂ and SO₃ are -298.2 kJ and -98.2 kJ.
- The molecular weight of a gas is 45. Its density at STP is
- Cannizzaro reaction is not given by
- The reaction of chloroform with ethylamine in alcoholic alkali gives
Topics: Thermodynamics (179)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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