Problem: Which compound will have the greatest viscosity?A. C9H20 B. H3COH C. HCOOH D. CO(l) E. ether, H3C-O-CH3

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We’re being asked to determine which compound will have the greatest viscosity


Recall that there are several types of intermolecular forces:

1. Ion-dipole interaction – occurs between an ion and a polar covalent compound

2. Hydrogen bonding – occurs in compounds where hydrogen is directly connected to an electronegative element such as N, O, or F

3. Dipole-dipole interaction – occurs between two polar covalent compounds

4. Induced-dipole interaction – occurs when a nonpolar compound interacts with a polar compound

5. Dispersion forces – occurs in all compounds. This is the primary intermolecular force exhibited by nonpolar compounds.


Compounds with strong intermolecular forces the higher the greatest viscosity. This is because they require more energy to be able to break the bonds during the phase transition.

 

Analyzing the compounds:

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Problem Details

Which compound will have the greatest viscosity?

A. C9H20 

B. H3COH 

C. HCOOH 

D. CO(l) 

E. ether, H3C-O-CH3

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