Home » Ask & Discuss » Chemistry. » Organic Chemistry « Back to Discussion



Organic Chemistry

Cool goIITian

Joined: 23 Dec 2009
Post: 63
15 Mar 2010 05:32:23 IST
0 People liked this
3
1267 View Post
Why glycerol is more viscous than water?
None

Why glycerol is more viscous than water?


Share this article on:

Comments (3)

winx's Avatar

Scorching goIITian

Joined: 28 Jan 2010
Posts: 299
19 Mar 2010 10:20:11 IST
1 people liked this

Because there is a greater amount of intermolecular forces in glycerol than in water

 

Both glycerol and water are polar molecules that attract each other by hydrogen bonds.

The reason for this is that they both contain hydrogen atoms that are bonded to oxygen, an atom with a small radius and high electronegativity.

The polarity of glycerol is due to three -OH groups attached to each of the three carbon atoms in the chain. Since there are as many as three such groups, would make glycerol even more polar than water.

 

Moreover, all molecules attract one another by so-called London forces that depend on the masses of molecules.

The molecular mass of H2O is about 18 amu, while the molecular mass of C3H5(OH)3 is about 92 amu, making London forces between glycerol molecules stronger than London forces between water molecules.

 

edison's Avatar

Forum Expert
Joined: 19 Oct 2006
Posts: 7452
30 Jan 2011 21:12:58 IST
0 people liked this

Glycerol is more viscous than water because of the strong intermolecular force of attraction in the former which causes more internal friction therefore more viscosity.
evaru's Avatar

Blazing goIITian

Joined: 26 Aug 2010
Posts: 308
1 Feb 2011 10:18:54 IST
0 people liked this

Both glycerol and water are polar molecules that attract each other by hydrogen bonds.The reason for this is that they both contain hydrogen atoms that are bonded to oxygen, an atom with a small radius and high electro negativity.The polarity of glycerol is due to three -OH groups attached to each of the three carbon atoms in the chain. Since there are as many as three such groups, would make glycerol even more polar than water.



Quick Reply


Reply

Some HTML allowed.
Keep your comments above the belt or risk having them deleted.
Signup for a avatar to have your pictures show up by your comment
If Members see a thread that violates the Posting Rules, bring it to the attention of the Moderator Team
Free Sign Up!

Preparing for IIT-JEE ?

Arihant Revision Package for IIT JEE - Books, Practice Tests + Rank Predictor


@ INR 1,995/-

For Quick Info

Name

Mobile No.

Find Posts by Topics

Physics.

Topics

Mathematics.

Chemistry.

Biology

Parents

Board

Fun Zone

Sponsored Ads