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The entropy change associated with the c...

The entropy change associated with the conversion of 1 kg of ice at 273 K to water vapours at 383 K is :
(Specific heat of water liquid and water vapour are `4.2kJK^(-1)kg^(-1)` and `2.0kJK^(-1)kg^(-1)` , heat of liquid fusion and vapourisation of water are `334kJ kg^(-1)` and `2491kJ kg^(-1)`, respectively ). (`log 273=2.436,log373=2.572, log 383=2.583`)

A

`7.90" kJ kg"^(-1)K^(-1)`

B

`2.64" kJ kg"^(-1)K^(-1)`

C

`8.49" kJ kg"^(-1)K^(-1)`

D

`9.26" kJ kg"^(-1)K^(-1)`

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Entropy change involve in conversation of 1 mole of liquid water at 373K to vapour at the same temperature (latent heat of vaporisation of water= 2.257kJg^(-1))

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Knowledge Check

  • If 10 g of ice is added to 40 g of water at 15^(@)C , then the temperature of the mixture is (specific heat of water = 4.2 xx 10^(3) j kg^(-1) K^(-1) , Latent heat of fusion of ice = 3.36 xx 10^(5) j kg^(-1) )

    A
    `15^(@)C`
    B
    `12^(@)C`
    C
    `10^(2)C`
    D
    `0^(@)C`

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