Assertion :The heat of formation of water is equal to the heat of neutralisation of a strong acid with a strong base. Reason: Water involves to a very small extent while $H^{\oplus}$ ions from an acid combine very rapidly with $⊖ O H$ from a base to form $H_{2} O$ .

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
The enthalpy of neutralization is the change in enthalpy that occurs when one equivalent of an acid and one equivalent of a base undergo a neutralization reaction to form water and a salt.
The standard enthalpy change of neutralization for a strong acid and base is -13.7 kcal/mol
When a powerful acid and a powerful base react, enthalpy change is unique. It may be more clear in the example below,
$N a O H + H C l \to N a C l + H_{2} O$
when we consider the above reaction it is clear the only reaction we can see inside this is,

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Similar questions

Q. Assertion :Heat of ionisation of water is equal to the heat of neutralisation of a strong acid with a strong base. Reason: Water ionizes to very small extent while

H^{+}

ions from acid combine very rapidly with

{O H}^{-}

from base to form

H_{2} O

Assertion (A) Addition reaction of water to but-1-ene in acidic medium yields butan-1-ol.
Reason (R) Addition of water in acidic medium proceeds through the formation of primary carbocation.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

Q. For the following Assertion and Reason, the correct option is:
Assertion: The

p H

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Reason: The dissociation of water into

H^{+}

and

O H^{-}

an exothermic reaction.

Q. With regard to the assertion and reason, choose the correct option:
Assertion [A]: Inhabitants close to very busy airports are likely to experience health hazards.
Reason [R]: Sound levels of jet planes usually exceed 150 dB.

Assertion

Lithium sulphate does not form alums.

Reason

$L i^{+}$ is too small to form a stable lattice required for double-salt/alum formation.

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Assertion :The heat of formation of water is equal to the heat of neutralisation of a strong acid with a strong base. Reason: Water involves to a very small extent while H⊕ ions from an acid combine very rapidly with ⊖OH from a base to form H2O.

Assertion :The heat of formation of water is equal to the heat of neutralisation of a strong acid with a strong base. Reason: Water involves to a very small extent while $H^{\oplus}$ ions from an acid combine very rapidly with $⊖ O H$ from a base to form $H_{2} O$ .