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The dielectric constant is the ratio of the permittivity of a substance to the permittivity of free space. It is an expression of the extent to which a material concentrates electric flux, and is the electrical equivalent of relative magnetic permeability.
As the dielectric constant increases, the electric flux density increases, if all other factors remain unchanged. This enables objects of a given size, such as sets of metal plates, to hold their electric charge for long periods of time, and/or to hold large quantities of charge. Materials with high dielectric constants are useful in the manufacture of high-value capacitors.
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ReneThe dipole moment is a measure of the overall polarity of a molecule due to the separation of positive and negative charges. The dielectric constant is a measure of how well a material can insulate electric fields, which is influenced by the presence of dipoles in the material. Generally, materials with higher dipole moments tend to have higher dielectric constants.
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Why do polar substance have a high dielectric constant?
Water, due to its polar nature, has a large dielectric constant. Therefore, water molecule has a very large electric dipole moment and is forced to rotate to respond to an alternate external electric field. Hence water as a liquid has a very large dielectric constant i.e. 80. Mica on the other hand is less polar as water and hence has low dielectric constant.
What type of molecule has Dipole-Dipole forces created?
Ay molecule with a net dipole moment will have dipole -dipole interactions. These are molecules with polar bonds caused by a diference in electronegativity between the atoms being bonded.
When would dipole-dipole forces be significant?
When molecules have permanent dipole moments
What is the strongest force that exist between molecule of nitrogen monoxide?
The strongest intermolecular forces that would exist between molecules of NO would be dipole-dipole attractions. There are no hydrogen bonds formed, and so dipole-dipole would be the strongest. There will also be dispersion forces, but these are weaker than dipoles.
Can NF3 experience dipole dipole attractions?
Yes, NF3 can experience dipole-dipole attractions because it is a polar molecule. The molecule has a net dipole moment due to the unequal sharing of electrons between nitrogen and fluorine atoms, leading to partial positive and negative charges that can interact with each other through dipole-dipole forces.
