Why is the boiling point of water lower than hydrogen peroxide
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Why is the boiling point of water lower than hydrogen peroxide

[From: ] [author: ] [Date: 13-03-06] [Hit: ]
What is he considering to be a hydrogen bond.Hydrogen bonds exist between molecules of water, not within a molecule a molecule of water.And this last statement, The more hydrogen bonds, the more the molecules want to stay together since the molecule becomes more polar,......

Ich will says, "If you look at the structures, however, you find water has only one hydrogen bond while hydrogen peroxide has two." No. Water can form up to four hydrogen bonds although it rarely does, and hydrogen peroxide could theoretically form six hydrogen bonds. What is he considering to be a hydrogen bond. Hydrogen bonds exist between molecules of water, not within a molecule a molecule of water.

And this last statement, "The more hydrogen bonds, the more the molecules want to stay together since the molecule becomes more polar, thus requiring more energy (heat) to evaporate." is but one more example of how instruction on intermolecular forces is inadequate. Hydrogen bonding has **nothing** to do with making a molecule polar. The polarity of a molecule is a function of its geometry and the vector sum of its dipole moments.

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Both water and Hydrogen peroxide have hydrogen bonds. This means a Hydrogen atom is bonded to and Oxygen, Nitrogen or Fluorine. If you look at the structures, however, you find water has only one hydrogen bond while hydrogen peroxide has two.

http://en.wikipedia.org/wiki/Water

http://en.wikipedia.org/wiki/Hydrogen_pe…

The more hydrogen bonds, the more the molecules want to stay together since the molecule becomes more polar, thus requiring more energy (heat) to evaporate.

OH, and let me clarify. Hydrogen bonds ARE NOT actually "bonds." They are called that because they are the strongest intermolecular force and were once thought to be a chemical bond due to their strength. No bonds are broken in phase changes, only IMF's.

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During a chemical change as liquid turning into gas, there needs to be a certain amount of heat(energy) to break the intermolecular bonds, that's why when water freezes/boils it doesn't change temperature, because the energy isn't going to rise the temperature, it's going to split the bonds, so I guess water has weaker bonds
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