1. Tardigrade
  2. Question
  3. Chemistry
  4. The heat of neutralisation of four acids A, B, C and D when neutralised against a common base are 13.7,9.4 11.2 and 12.4 kCal respectively. The weakest among these acids is:

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Q. The heat of neutralisation of four acids $A, B, C$ and $D$ when neutralised against a common base are 13.7,9.4 11.2 and $12.4\, kCal$ respectively. The weakest among these acids is:

Thermodynamics

Solution:

Some of the heat evolved during neutralization reaction is utilised to ionise the weak acid, this happen in the case of weak acid.

Thus; less heat is evolved. Hence; lower the value of heat of neutralization, weaker is the acid. Thus; B is the weakest acid.