Grade 11 Intermolecular forces worksheet question
Hello! (btw this is grade 11 chemistry... forgot to put that in the title)
So we've studied inter and intramolecular forces, along with polar and non polar molecules.
We've went over LD forces, Dipole-Dipole forces, and Hydrogen bonding so I'm fine with that.
My question comes with this worksheet, as it asks :
1. Draw a diagram to show how 5 water molecules would interact in liquid state
2. Draw a diagram to show how water molecules would interact in a gas state
3. Explain, using intermolecular forces, what has happened when the sample of water has changed from a liquid to gas.
Now, I don't want you to actually draw the diagrams. Just answer the questions I have about this question:
H2O contains a dipole-dipole intermolecular force, however, how does its state (water or gas) affect the way its drawn?
Either way, how would I draw 5 water molecules reacting in liquid state?
Also, could you please explain the answer to the last question?
Please provide a brief explanation to your answers, if you can.
Thank you so much basil!
3 Comments • Newest first
H2O in liquid the Hydrogens from one water will face the oxygen of the other water. And another hydrogen from a 3rd water will face that oxygen
For your last question, water transitions from liquid to gas through heating which provides energy. Because the molecules have more energy, they can overcome dipole-dipole forces moreso than when they are in liquid state, hence why they are further apart.
Just think of the state and it should be easy. Solid = every thing packed together. Gas = every thing as far as possible. Liquid = decent sized gaps.
Because h2o is hydrogen bonded, they are attracted to each other (electrostatic attraction between polar molecules that occurs when a hydogen atom is bonded with a highly electronegative atom (only fluorine, oxygen and nitrogen)) thus making it a strong diople-diople bond when enough is present. You would draw this by connecting h2o to other h2o molecules with small dashes.
[url=http://imgur.com/aEIyxfy]Here is an example[/url]
Note: the dashes are between positive and negative ends. You cannot h-bond a hydrogen to another hydrogen; it must be hydrogen to oxygen and vice-versa.
h2o(aq) would be exactly like the picture I posted. h2o (g) would be the same as the picture, but it would be more spread out; i.e the dashes would be longer.