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The pH of pure water at 25^(@)C and 35^(...

The `pH` of pure water at `25^(@)C` and `35^(@)C` are `7` and `6`, respectively. Calculate the heat of formation of water from `H^(o+)` and `overset(Θ)OH`.

A

`DeltaH=84.551" kcal/mol"`

B

`DeltaH=-84.551" kcal/mol"`

C

`DeltaH=44.981" kcal/mol"`

D

`DeltaH=-44.981" kcal/mol"`

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • The pH of pure water at 25^(@)C and 35^(@)C are 7 and 6 respectively. What is the heat of formation of water from H^(+) and OH^(-) ?

    A
    `84.55 kcal mol^(-1)`
    B
    `-84.55kcal mol^(-1)`
    C
    `74.55 kcalmol^(-1)`
    D
    `-74.55 kcal mol^(-1)`

  • The P^(H) of pure water at 25^(0)C and 35^(0)C are 7 and 6 respectively. The heat of formation of water from H^(+) and OH^(-) will be.

    A
    `+84.551 KCal "Mole"^(-1)`
    B
    `-84.551 KCal "Mole"^(-1)`
    C
    `+8.4551 KCal "Mole"^(-1)`
    D
    `-8.455 KCal "Mole"^(-1)`

  • The pH of pure water at 80^(@)C will be

    A
    `gt7`
    B
    `lt7`
    C
    `=7`
    D
    cannot be predicted

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