Sort these substances by boiling point

In summary, HCOOH, C4H10, C2H6, CH2, and H2 are all polar covalent except for H2 which is pure covalent. The boiling point of a substance depends on the strength of its intermolecular forces, which can be determined by factors such as dipole-dipole attraction, hydrogen bonding, and van der Waals forces. Therefore, to sort these compounds by boiling point, one must consider the relative strength of these intermolecular forces for each compound.
  • #1
transgalactic
1,395
0
HCOOH
C_4H_10
C_2H_6
CH_2
H_2they all are polar covalent
except H_2 which is pure covalent
how to sort them??
 
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  • #2
Stronger bonds will have higher boiling points. Look in your chemistry book about the strengths of different types of bonds.
 
  • #3
it depends on the electro negativity value difference between two
substance
but here there are more then two ellements
and more then one appearence
of the same ellement

??
 
  • #4
Boiling point is a measure of the amount of thermal energy that has to be provided in order to overcome whatever intermolecular forces exist between the molecules of the material when it is in liquid form.

Therefore, look at each of the species in question and work out which ones would likely have a notable number of (a) dipole-dipole attraction, (b) instantaneous-dipole/induced-dipole attractions, (c) hydrogen bonding, and which would only be likely to exhibit the weaker van der Waals type intermolecular forces.

For example, you would expect H2O water to have a higher boiling point than CH3OH methanol because water has a higher dipole moment, and also a greater tendency for hydrogen bond formation (two hydrogen atoms with partial positive charge per molecule, as opposed to only one in methanol).

If you take a look through the 5 compounds you have listed you should be able to rank them in this way.
 

Related to Sort these substances by boiling point

1. What is boiling point?

Boiling point is the temperature at which a substance changes from a liquid to a gas.

2. How is boiling point measured?

Boiling point is typically measured using a thermometer and is usually reported in degrees Celsius or Fahrenheit.

3. Why is it important to sort substances by boiling point?

Sorting substances by boiling point is important because it helps to determine their physical properties and how they will behave under certain conditions, such as in chemical reactions or industrial processes.

4. What factors affect boiling point?

The main factors that affect boiling point are the strength of intermolecular forces, the size and shape of molecules, and the pressure on the substance.

5. Can boiling point change?

Yes, boiling point can change depending on the conditions. For example, at higher elevations where the atmospheric pressure is lower, the boiling point of water is lower as well.

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