Problem: For each of the following pairs of molecules, identify the dominate intermolecular force, and answer the associated question.a. NH2CH2CH2CH3            N(CH 3)3____________________   ____________________Which of the above compounds is expected to have the highest viscosity? b. CsF                                 ClF____________________   ____________________Which of the above compounds is expected to have the highest vapor pressure? c. CO2                                SO   2____________________  ____________________Which of the above compounds is expected to have the highest boiling point? When we looked at the series of compounds: H 2O, H2S, H2Se, H2Te, boiling point increased from H2S to H2Se to H2Te, but H2O had the highest boiling point of the four. Explain the trend and why H2O is an exception.   If, however, you look at the trend for the compounds: (H 3C)2O, (H3C)2S, (H3C)2Se, (H3C)2Te, then boiling point increases as you go down the periodic table and (H3C)2O is not an exception. Explain.

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For each of the following pairs of molecules, identify the dominate intermolecular force, and answer the associated question.

a. NH2CH2CH2CH3            N(CH 3)3

____________________   ____________________

Which of the above compounds is expected to have the highest viscosity?

 

b. CsF                                 ClF

____________________   ____________________

Which of the above compounds is expected to have the highest vapor pressure?

 

c. CO2                                SO   2

____________________  ____________________

Which of the above compounds is expected to have the highest boiling point?

 

When we looked at the series of compounds: H 2O, H2S, H2Se, H2Te, boiling point increased from H2S to H2Se to H2Te, but H2O had the highest boiling point of the four. Explain the trend and why H2O is an exception.

  

If, however, you look at the trend for the compounds: (H 3C)2O, (H3C)2S, (H3C)2Se, (H3C)2Te, then boiling point increases as you go down the periodic table and (H3C)2O is not an exception. Explain.

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