Question

Equal volumes of molar hydrochloric acid and sulphuric acid
are neutralized by dil. NaOH solution and x kcal and y kcal of
heat are liberated respectively. Which of the following is true?
(a) x = y (b) x = 1/2 y
(c) x = 2y (d) None of these

Answer 1

Answer:

The correct answer will be x = y/2

But it is not there in the options

Answer 2

The one which is true is

• option: (b)

*Heat of neutralisation = Heat of formation of water that is (1mol)

*here is the reaction

• HCL+NaCL- NaCL +H2O, here delta H = -X

• H2SO4 +2NaOH- Na2SO4 +2H2O ,here delta H = -Y

• H+OH - H2O , here delta H= -Y/2

• delta H =delta H

* hence x= 1/2y