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Calculate the value of molal elevation c...

Calculate the value of molal elevation constant for water if `Delta S_("vaporisation")` is `26.33 cal K^(-1) mol^(-1)`.

Text Solution

Verified by Experts

The correct Answer is:
`0.51 K "molality"^(-1)`.
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Knowledge Check

  • Calculate the ebullioscopic constant for water. The heat of vaporisation is 40.685 kJ mol^(-1)

    A
    0.512 K kg `mol^(-1)`
    B
    1.86 K kg `mol^(-1)`
    C
    5.12 K kg `mol^(-1)`
    D
    3.56 K kg `mol^(-1)`

  • The depression of freezing point of a solvent (b.p:303 K) for a particular solution is 0.153 K. Calculate the molal elevation constant if the boiling point of the solution is 304.52 K .(K_(f) =1.68 K kg mol ^(-1))

    A
    `1.68k m^(-1)`
    B
    `16.8Km^(-1)`
    C
    `0.68 Km^(-1)`
    D
    `11.6 km^(-1)`

  • Calculate the molal elevation constant of water evaporates at 100^(@)"C" with the absorption of 536 calories per gm ("R"=2 "cals")

    A
    `0.519^(@)"C"`
    B
    `0.0519^(@)"C"`
    C
    `1.519^(@)"C"`
    D
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    A solution containing 0.45 g of urea in 22.50 g of water gave a boiling point elevation of 0.17 K. Calculate the molal biling point elevation constant for water. Molar mass of urea is 60 g mol^(-1)

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    Calculate the molal elevation constant , "K"_("b") for water and the boiling point of 0.1 molal urea solution. Latent heat of vaporisation of water is 9.72 kcal "mol"^(-1) at 373.15K.

    The freezing point of an aqueous solutions is 272 .93 K . Calculate the molality of the solution if molal depression constant for water is 1.86 Kg mol^(-1)

    The observed depression in the freezing point of water for a perticular solution is 0.087 K . Calculate the molality of the solution if molal depression constant for water is 1.86 K kg mol^(-1)

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