Quick Answer: What has a lower boiling point?

How do you know what has a lower 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.

What makes something have a low boiling point?

Explanation. There are intermolecular forces between small molecules. Intermolecular forces are much weaker than the strong covalent bonds in molecules. … Relatively little energy is needed to overcome the intermolecular forces, so small molecular substances have low melting and boiling points.

Which of the following compounds has the lowest boiling point?

Boiling points of alkanes increase as the number of carbon atom increase or molecular mass increase. Alkenes have high boiling point, so CH3CH2CH2CH3 has 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.

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Why does h2 have a low boiling point?

The extremely low melting and boiling points result from weak forces of attraction between the molecules. … A molecule of hydrogen is the simplest possible molecule. It consists of two protons and two electrons held together by electrostatic forces.

Why does iodine have a low boiling point?

Iodine is a larger molecule, with more electrons, than chlorine. Therefore Iodine has stronger intermolecular forces than chlorine, which require more energy to break.

Which substance has the higher boiling point?

The chemical element with the lowest boiling point is Helium and the element with the highest boiling point is Tungsten. The unity used for the melting point is Celsius (C).

Which alkanes 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

Which of the following alkanes have lowest boiling point?

Due to least surface area, neopentane has the lowest b.p. but due to high symmetry it has the highest m.p.

Which hydrocarbon has the lowest boiling point?

The Saturated Hydrocarbons, or Alkanes

Name Molecular Formula Boiling Point (oC)
ethane C2H6 -89
propane C3H8 -42
butane C4H10 -0.5
pentane C5H12 36