Question

___is evolved during neutralisatonm reaction​

Answer 1

Heat is evolved during neutralisation reaction.

Explanation:

The reaction between acid and a base to give a salt and water is known as a neutralisation reaction. Generally, heat is evolved during this reaction and acidic properties of the acid disappear.

The general equation will be :-

Acid + base ⸻➤ Salt + water .

For example :-

HCl(aq) + NaOH(aq)⸻➤ NaCl(aq)+ ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠀⠀⠀H2O(l)

here,

HCl - hydrochloric acid

NaOH - sodium hydroxide ( base )

NaCl - Sodium Chloride ( salt )

H2O - water

Answer 2

Answer:

The heat (or enthalpy) of neutralization (ΔH) is the heat evolved when an acid and a base react to form a salt plus water. Q in the above equation is -ΔH and is expressed in kJ/mol of water. Neutralization reactions are generally exothermic and thus ΔH is negative.