The absolute enthalpy of neutralisation of the reaction

The Absolute Enthalpy Of Neutralisation Of The Reaction Mgos Chemistry Question

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:

  1. A nucleophilic substitution reaction proceeds through SN1 mechanism.
  2. Chlorine dioxide is best prepared by passing dry
  3. Which of the following is correct relationship
  4. Number of moles of MnO₄⁻ required to oxidize one mole of ferrous oxalate
  5. The variation of the boiling points of the hydrogen halides is in the order

Topics: Thermodynamics (179)
Subject: Chemistry (2512)

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

NEETLab Mobile App

Share this page with your friends

Be the first to comment

Leave a Reply

Your email address will not be published.


*