How do you know which compound has the lowest boiling point?

How do you determine lowest boiling point?

Intermolecular forces (IMFs) can be used to predict relative boiling points. The stronger the IMFs, the lower the vapor pressure of the substance and the higher the boiling point. Therefore, we can compare the relative strengths of the IMFs of the compounds to predict their relative boiling points.

Which compound will have the lowest boiling point?

The one with the weakest IMF will have the lowest boiling point. CH4 has only dispersion forces while all the others have dispersion PLUS either dipole-dipole (HCl, H2S, NH3), and/or hydrogen bonding (NH3). So, CH4 will have the lowest boiling point.

Which compound has the lowest boiling point quizlet?

CO2 is a nonpolar molecular compound. The only intermolecular force present is a relatively weak dispersion force (small molar mass). CO2 will have the lowest boiling point.

Which compound below has the highest boiling point?

Among the molecules given to us, the highest boiling point is of water H2O H 2 O . This is because of the presence of hydrogen bonding between the molecules of water which led to increasing boiling point.

How do you know which molecule has a higher boiling point?

In general, larger molecules have higher boiling points than smaller molecules of the same kind, indicating that dispersion forces increase with mass, number of electrons, number of atoms or some combination thereof.

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What alkane has the lowest boiling point?

For any group of isomeric alkanes, the most branched isomer has the lowest boiling point. The normal alkane has the highest boiling point.

3.7 Physical Properties of Alkanes.

Hydrocarbon Boiling Point (°C) Density (g/mL)
Propane 42.1 0.690
Butane −0.5 0.711
Pentane 36.1 0.6262
Hexane 68.9 0.6603
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