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Consider following figure and answer the...

Consider following figure and answer the questions at the end of it.
Figure explains elevation in boiling point when a non-volatile solute is added to a solvent.

Variation of vapour pressure with temperature and showing elevation in boiling point.
Given that `DeltaT_(b)` is the elevation in boiling point of the solvent in a solution of molality 'm' then `underset(m rarr 0)(Lt) ((Detal T_(b))/(m))` is equal to

A

`K_(b)` (molal elevation constant)

B

`L_(v)` (latent heat of vaporization)

C

`Delta S` (entropy change)

D

x (mole fraction of solute)

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • Consider following figure and answer the questions at the end of it. Figure explains elevation in boiling point when a non-volatile solute is added to a solvent. Variation of vapour pressure with temperature and showing elevation in boiling point. Given that DeltaT_(b) is the elevation in boiling point of the solvent in a solution of molality m then underset(mto0)(Lt)((DeltaT_(b))/(m)) is equal to

    A
    `K_(b)` (molal elevation constant)
    B
    `L_(y)` (latent heat of vaporization)
    C
    `DeltaS` (entropy change)
    D
    x (mole fraction of solute)

  • Figure explains elevation in boiling point when a non-volatile solute is added to a solvent. Variation of vapour pressure with temperaure and elevation in boiling point is marked. Given that DeltaT_(b) is the elevation in boiling point of the solvent in a solution of molarity m then lim_(m rarr 0) ((Delta T_(b))/(m)) is equal to:

    A
    `K_(b)` (molal elevation constant)
    B
    `L_(v)` (latent heat of vaporisation)
    C
    `DeltaS` (entropy change)
    D
    x (mole fraction of solute)

  • Consider following figure and answer the questions at the end of it. Figure explains elevation in boiling point when a non-volatile solute is added to a solvent. Variation of vapour pressure with temperature and showing elevation in boiling point. Elevation in boiling point of an aqueous urea solution is 0.52^(@).(K_(b)=0.52^(@)mol^(-1)kg) . Hence, mole fraction of urea in this solution is:

    A
    0.982
    B
    0.0567
    C
    0.943
    D
    0.018

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    Consider following figure and answer the questions at the end of it. Figure explains elevation in boiling point when a non-volatile solute is added to a solvent. Variation of vapour pressure with temperature and showing elevation in boiling point. Elevation in boiling point of an aqueous urea solution is 0.52^(@) . ( K_(b) = 0.52^(@) mol^(-1)kg) . Hence, mole fraction of urea in this solution is

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