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Though the dipole moment of HF and ethyl fluoride is same yet the boiling point of ethyl fluoride isapprx -37 0 C and that of HF is 19 0 C approx. Why? Though the dipole moment of HF and ethyl fluoride is same yet the boiling point of ethyl fluoride isapprx -370C and that of HF is 190C approx. Why?
Though the dipole moment of HF and ethyl fluoride is same yet the boiling point of ethyl fluoride isapprx -370C and that of HF is 190C approx. Why?
Since the dipole moment of Ethyl Fluoride and Hydrogen Fluoride is same, its not of concern here, but rather only van der waals forces which depend mainly on the size of the molecule The strength is based on intermolecular interactions. Ethyl Fluoride is nonpolar and have very weak interactions between the molecules resulting in a low boiling point. Hydrogen Fluoride forms hydrogen bonding which is harder for it to break apart because the bond are stronger. Resulting that the HF boiling point is much higher. --- Please feel free to post as many doubts on our disucssion forum as you can. If you find any question difficult to understand - post it here and we will get you the answer and detailed solution very quickly. We are all IITians and here to help you in your IIT JEE preparation. All the best. Regards, Naga Ramesh IIT Kgp - 2005 batch
Since the dipole moment of Ethyl Fluoride and Hydrogen Fluoride is same, its not of concern here, but rather only van der waals forces which depend mainly on the size of the molecule
The strength is based on intermolecular interactions.
Ethyl Fluoride is nonpolar and have very weak interactions between the molecules resulting in a low boiling point.
Hydrogen Fluoride forms hydrogen bonding which is harder for it to break apart because the bond are stronger. Resulting that the HF boiling point is much higher.
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Please feel free to post as many doubts on our disucssion forum as you can. If you find any question difficult to understand - post it here and we will get you the answer and detailed solution very quickly. We are all IITians and here to help you in your IIT JEE preparation. All the best. Regards, Naga Ramesh IIT Kgp - 2005 batch
Ethyl fluoride is indeed polar, contrary to what is said by Naga Ramesh, and can be a hydrogen bond recipient. But there is no hydrogen bonding between molecules of ethyl fluoride like there is between molecules of HF. Hydrogen bonding is responsible for the greater boiling point of HF.
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