Intermolecular forces between NO particles

In summary, the conversation discusses determining whether the N-O bond is polar or non-polar based on the electronegativity difference between N and O. The best approach is to remember basic electronegativity values for common elements and also consider covalent bonding. The asymmetry of the NO molecule suggests it is polar, and both dipole-dipole and London dispersion forces contribute to its polarity.
  • #1
i_love_science
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Homework Statement
Identify the most important types of intermolecular forces present in NO.
Relevant Equations
intermolecular forces - London dispersion forces, dipole-dipoles forces, hydrogen bonding, ion-dipole forces
The answer is dipole-dipole and London dispersion forces, but I only chose London dispersion forces. How would you determine whether there is a large or small electronegativity difference between N and O? And therefore how would you determine whether the N-O bond is polar covalent or non polar covalent, not given electronegativity values?

Thanks.
 
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  • #2
Best approach is to remember some basic electronegativity values for most common elements (which as actually trivial: -4 for fluorine, then minus half for each next element while moving to the left though the periodic table, 2.2 for hydrogen and you have covered the most important ones).
 
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  • #3
In the case of NO, I would also include covalent bonding, as N2O2 is in equilibrium with NO. You may argue whether this is really an intermolecular interaction, but at the end, all these distinction are artificial. E. g., all these interaction will contribute to the virial coefficients.
 
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  • #4
Draw the structure of NO and observe that it is non-symmetrical. Non-symmetrical molecules are generally polar.
 
  • #5
Besides dipole-dipoles forces, London dispersion forces are also there. In polar molecules, cumulative effect of dipole-dipoles forces and London dispersion forces exists.
 

1. What are intermolecular forces?

Intermolecular forces are attractive or repulsive forces that exist between molecules. These forces play a crucial role in determining the physical properties of substances, such as melting and boiling points, viscosity, and solubility.

2. How do intermolecular forces affect NO particles?

Intermolecular forces between NO particles are responsible for the interactions between the molecules. These forces determine the strength of the bonds between NO molecules and can affect the physical state and properties of the substance.

3. What types of intermolecular forces exist between NO particles?

The main types of intermolecular forces between NO particles are London dispersion forces, dipole-dipole interactions, and hydrogen bonding. London dispersion forces are the weakest, while hydrogen bonding is the strongest.

4. How do intermolecular forces affect the boiling point of NO particles?

The strength of intermolecular forces between NO particles affects the boiling point. The stronger the intermolecular forces, the higher the boiling point. For example, NO has a boiling point of -152°C, while NO2, which has stronger intermolecular forces, has a boiling point of -21°C.

5. Can intermolecular forces between NO particles be manipulated?

Yes, intermolecular forces can be manipulated by changing the temperature or pressure of the substance. They can also be affected by the addition of other substances, such as solutes, which can disrupt the intermolecular forces between NO molecules.

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