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  • How to solve this problem- Calculate the molal depression constant of a solvent which has freezing point 16.60C and latent heat of fusion 180.75Jg-1

Calculate the molal depression constant of a solvent which has freezing point 16.60C and latent heat of fusion 180.75Jg-1

  • Option 1)

    2.68

  • Option 2)

    3.86

  • Option 3)

    4.68

  • Option 4)

    2.86t6

 

Answers (1)

best_answer

As we learned 

 

Dependence of K_{f} -

K_{f}= \frac{RT_{f}^{2}m}{1ooo\Delta H_{fusion}}

-

 

 K_{f}=\frac{RT_{f}^{2}}{100\times L_{f}},\: R=8.314JK^{-1}mol^{-1}

T_{f}=273+16.6 = 289.6K;\: \: L_{f}=180.75Jg^{-1}

K_{f}=\frac{8.314 \times 289.6 \times 289.6}{1000\times 180.75}

 


Option 1)

2.68

Option 2)

3.86

Option 3)

4.68

Option 4)

2.86t6

Posted by

Aadil

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