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I need help with this problem: a) Which of the following solid compounds that has the...

I need help with this problem:

a) Which of the following solid compounds that has the highest melting point. Explain why.

Ar(s), CCl4(s), LiCl(s), MgO(s) and CH3OH(s)

b) Refer to intermolecular forces when you explain why:

C2H6 has a higher boiling point than CH4

C2H5OH has a higher boiling point than C2H6

C2H5OH has a lower boiling point than NaF

CO has a bit higher boiling pont than N2
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Answer #1

a) The highest melting point will be of ionic compound , here the ionic compound is LiCl

b)

Due to high molecular weight C2H6 will have high boiling point than CH4

Due to presence of hydrogen bonded to highly electronegative oxygen the given compound may form hydrogen bond so has high boiling point than C2H6

As NaF is ionic compound so it will have high boiling or melting point

Carbot monoxide contains heteroatoms and thus is polar due to uneven distribution of electron cloud as compared to homodiatomic nitrogen molecule. Since it is more polar, the bonds between atoms are stronger and hence wil; have high boiling point as compared to nitrogen

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