Respuesta :
Despite the theoretically minimal dispersion forces, large molecular mass and chain tangles can have an impact on boiling point.
Motor oil
Repeated -CH 2 molecules form lengthy, apolar chains that are distinctive to motor oil. The chemicals found in motor oils have only intermolecular interactions because of their nonpolar structure and lack of electronegativity difference; to be more exact, they are subject to particular London dispersion forces.
The boiling point shouldn't be high because the London dispersion forces aren't too powerful. However, because of the substantial molecular mass and higher electron number of these lengthy chains, the dispersion forces are significantly increased.
Additionally, when chains tangle, they take on new configurations that may reduce their surface area and increase the amount of energy needed to vaporize them.
Therefore, a high boiling point may be caused by two main factors: large molecular mass and chain tangling.
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