CHEM-1110.501 Chapter 7 ChemDraw: Drawing EEX × C O ezto.mheducation.com/hm.tpx

Question

CHEM-1110.501 Chapter 7 ChemDraw: Drawing EEX × C O ezto.mheducation.com/hm.tpx Question 23 (of 24) 23· 4.16 points 3 out of 3 attempts Be sure to answer all parts Assist Checi What kind(s) of intermolecular forces exist in each molecule given below? (Select all that apply) (a) CH3CH2CH2CH2CH3) () H2CO(U) dispersion forces dipole-dipole forces hydrogen bonding dispersion forces dipole-dipole forces hydrogen bonding Print (b) CH3CH20HU) Jdispersion forces (d) o21) dipole-dipole forces hydrogen bonding dispersion forces dipole-dipole forces hydrogen bonding View Details of Last Check Answer References eBook& Resources SAMSUN

Explanation / Answer

Recall that

dispersion forces --> all species, due to the fact of electron distribution.

dipole-dipole --> only polar species, since they form dipole interaction

H-bonds -->

Note that for Hydrogen bonding, we must have the next conditions:

- Species is polar, i.e. there are dipole-dipole interactions between the molecules

- There must be an acidic Hydrogen bonded directly to either, N,O,F; which are very electronegative species.

a)

this is nonpolar

will not form any kind of dipoles

therefore, only dispersion forces exist

b)

This is ethanol, will form polar species, since OH is electrongatvie

it also forms H-bonds

so choose ALL

c)

this is HCOOH, formaldehyde it is very polar, will form H- bonds

choose All

d)

O2 is nonpolar, will not form any kind of dipole interaction

no H present

only choose dispercion forces

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