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Enthalpy of neutralzation is defined as ...

Enthalpy of neutralzation is defined as the enthalpy change when 1 mole of acid`/ /`base is completely neutralized by base `//`acid in dilute solution .
For Strong acid and strong base neutralization net chemical change is
`H^(+) (aq)+OH^(-)(aq)to H_(2)O(l)`
`Delta_(r)H^(@)=-55.84KJ//mol`
`DeltaH_("ionization")^(@)` of aqueous solution of strong acid and strong base is zero .
when a dilute solution of weak acid or base is neutralized, the enthalpy of neutralization is somewhat less because of the absorption of heat in the ionzation of the because of the absorotion of heat in the ionization of the weak acid or base ,for weak acid /base
`DeltaH_("neutrlzation")^(@)=DeltaH_("ionization")^(@)+ Delta _(r)H^(@)(H^(+)+OH^(-)to H_(2)O)`
If enthalpy of neutralization of `CH_(3)COOH` by NaOH is -49.86KJ`//`mol then enthalpy of ionization of `CH_(3)COOH` is:

A

`5.98 KJ//mol`

B

`-5.98 KJ//mol`

C

`105.7 KJ//mol`

D

None of these

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The correct Answer is:
A
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Knowledge Check

  • Enthalpy of neutralzation is defined as the enthalpy change when 1 mole of acid /base is completely neutralized by base // acid in dilute solution . For Strong acid and strong base neutralization net chemical change is H^(+) (aq)+OH^(-)(aq)to H_(2)O(l) Delta_(r)H^(@)=-55.84KJ//mol DeltaH_("ionization")^(@) of aqueous solution of strong acid and strong base is zero . when a dilute solution of weak acid or base is neutralized, the enthalpy of neutralization is somewhat less because of the absorption of heat in the ionzation of the because of the absorotion of heat in the ionization of the weak acid or base ,for weak acid /base DeltaH_("neutrlzation")^(@)=DeltaH_("ionization")^(@)+ Delta _(r)H^(@)(H^(+)+OH^(-)to H_(2)O) What is DeltaH^(@) for complate neutralization of strong diacidic base A(OH)_(2)by HNO_(3) ?

    A
    `-55.84KJ`
    B
    `-111.68KJ`
    C
    `55.84KJ`
    D
    none of these

  • Enthalpy of neutralzation is defined as the enthalpy change when 1 mole of acid // base is completely neutralized by base // acid in dilute solution . For Strong acid and strong base neutralization net chemical change is H^(+) (aq)+OH^(-)(aq)to H_(2)O(l) Delta_(r)H^(@)=-55.84KJ//mol DeltaH_("ionization")^(@) of aqueous solution of strong acid and strong base is zero . when a dilute solution of weak acid or base is neutralized, the enthalpy of neutralization is somewhat less because of the absorption of heat in the ionzation of the because of the absorotion of heat in the ionization of the weak acid or base ,for weak acid /base DeltaH_("neutrlzation")^(@)=DeltaH_("ionization")^(@)+ Delta _(r)H^(@)(H^(+)+OH^(-)to H_(2)O) under same conditions ,how many mL of 0.1 m NaOH and 0.05 M H_(2)A (strong diprotic acid ) solution should be mixed for a total volume of 100mL to producce the hight rise in temperature ?

    A
    `25:75`
    B
    `50:50`
    C
    `75:25`
    D
    `66.66:33.33`

  • Enthalpy of neutralization is defined as the enthalpy change when 1 mole of acid/base is completely neutralized by base/acid in dilute solution. For strong acid and strong base neutralization net chemical change is " "H^(+)(aq) + OH^(-)(aq) rarr H_(2)O(l), " " Delta_(r)H^(@) = -55.84 KJ//mol DeltaH_("ionization")^(@) of aqueous solution of strong acid and strong base is zero. When a dilute solution of a weak acid or base is neutalized, teh enthalpy of neutralization is some what less because of the absorption of heat in the ionization of the weak acid or base, for weak acid/base DeltaH_("neutrilization")^(2) = DeltaH_("ionization")^(@) + Delta_(r)H^(@) " " (H^(+) + OH^(-) rarr H_(2)O) Under the same condition how many mL of 0.1 M NaOH and 0.05 M H_(2) A (strong diprotic acid) solution should be mixed for a total volume of 100 mL produce the highest rise in temperature:

    A
    `25:75`
    B
    `50:50`
    C
    `75:25`
    D
    `66.66:33.33`

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