First slide

Enthalpy of neutralization

Question

For the reaction 2H₂O_(l) →H₃O⁺_(aq) + OH^-_(aq), the value of ΔH is

Moderate

A

114.6 KJ
B

-114.6 KJ
C

57.3 KJ
D

-57.3 KJ

Solution

H₃O⁺_(aq) + OH^-_(aq) → 2H₂O_(l) ΔH= -57.3KJ it represents heat of neutratization
for 2H₂O_(l) →H₃O⁺_(aq) + OH^-_(aq)ΔH= +57.3KJ

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