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19 gm of ice is converted into water at ...

19 gm of ice is converted into water at `0^(@)C` and 1 atm. The entropies of `H_(2)O(s)` and `H_(2)O(l)` are 38.2 and `60 J//"mol " K` respectively. The enthalpy change for this conversion is :

A

`5951.4 J//"mol"`

B

`595.14 J//"mol"`

C

`-5951.4 J//"mol"`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
A
At equilibrium `therefore " "DeltaH=T.DeltaS`
`H_(2)O(s)rarrH_(2)O(l)`
`DeltaS=S_(H_(2)O(l))-S_(H_(2)O(s))=21.8 J//"mol-K"`
`DeltaH=273 xx (21.8)=5951.4 J//"mol"`
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NARENDRA AWASTHI-THERMODYNAMICS-Exercise
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  2. What is the normal boiling point of mercury? Given : DeltaH (f)^(@)...

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  3. 19 gm of ice is converted into water at 0^(@)C and 1 atm. The entropie...

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  4. Using the listed [DeltaG(f)^(@) values] calculate DeltaG^(@) for the r...

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  5. From the following DeltaH^(@) and DeltaS^(@) values, predict which of ...

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  7. The entropies of H(2) (g) and H (g) are 130.6 and 114.6 J mol^(-1)K^(-...

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  8. Consider the DeltaG(f)^(@) and DeltaH(f)^(@) (kJ//mol) for the followi...

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  9. which of the folowing statement is correct?

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  10. Calculate DeltaG^(@) (kJ/mol) at 127^(@)C for a reaction with K("equil...

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  11. When reaction is at standard state at equilibrium, then

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  12. For the auto-ionization of water at 25^(@)C, H(2)O(l)iff H^(+)(aq)+OH^...

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  13. State Hess's law. Give two applications of it.

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  14. An imaginary reaction X rarr Y takes place in three steps X rarr A...

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  15. The enthalpy change for a reaction does not depend upon:

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  16. The standard enthalpy of formation of gaseous H(2)O at 298 K is -241.8...

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  17. Which of the following value of DeltaH(f)^(@) represent that the produ...

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  19. Calculate the standard enthalpy of reaction for the following reaction...

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