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H(2)O(l)toH^(+)(aq)+OH^(-)(aq),DeltaH^(0...

`H_(2)O(l)toH^(+)(aq)+OH^(-)(aq),DeltaH^(0)=57.32kJ*mol^(-1)`
`H_(2)(g)+(1)/(2)O_(2)(g)toH_(2)O(l),DeltaH^(0)=-285.8kJ*mol^(-1)` at `25^(@)C`. If `DeltaH_(f)^(0)[H^(+)(aq)]=0`, then the standard heat of formation `(kJ*mol^(-1))` for `OH^(-)(aq)` at `25^(@)C` is-

A

`-142.9`

B

`-228.48`

C

`-343.12`

D

`-253.71`

Text Solution

Verified by Experts

The correct Answer is:
B
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CHHAYA PUBLICATION-CHEMICAL THERMODYNAMICS-MCQ HOTSPOT (SINGLE CORRENT TYPE)
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  2. H(2)O(l)toH^(+)(aq)+OH^(-)(aq),DeltaH^(0)=57.32kJ*mol^(-1) H(2)(g)+(...

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  3. For a reaction at TK DeltaH gt0 and DeltaS gt0. If the reaction attai...

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  5. Which of the statements is true-

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  7. When a gas (molar mass=28g*mol^(-1)) of mass 3.5 is burnt completely i...

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  8. For the reaction, 2NH(3)(g) to N(2)(g)+3H(2)(g)-

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  9. Which of the following pairs is true for the process C(6)H(6)(g)[1atm,...

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  10. The internal energy change when a system goes from state P to Q is 30 ...

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  11. If at normal pressure and 100^(@)C the changes in enthalpy and entropy...

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  12. At 25^(@)C, the standard heat of formation for Br(2)(g) is 30.9kJ*mol^...

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  13. At 25^(@)C, when 0.5 mol of HCl reacts completely with 0.5 mol of NaOH...

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  14. On combustion C(x)H(y)(l) forms CO(2)(g) and H(2)O(l). At a given temp...

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  15. An ideal gas is compressed isothermaly at 25^(@)C from a volume of 10 ...

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  16. At 27^(@)C, for the reaction aA(g)+B(g)to2C(g),PDeltaV=-2.5kJ. The val...

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  17. When 1 mol of an ideal gas is compressed in a reversible isothermal pr...

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  18. For 0.5 mol of an ideal gas, 15 cal of heat is required to raise its t...

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  19. 1 mol of an ideal gas is enclosed in a cylinder fitted with a friction...

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  20. Given (at 25^(@)C): Ca(s)+(1)/(2)O(2)(g)toCaO(s),DeltaH^(0)=-635.2kJ...

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