Tuesday, May 3, 2011

Lab 10.3

The measurements that I took varied a lot, I was surprised in the amount of variation because I thought that the measurements would be much closer.  I think that if we measured more precisely it would make our trials more consistent across the board.
This is very important! because when temperatures go below freezing point celcius, the coolant needs to be able to run through the engine without freezing, freezing point depression allows it to not freeze even when temps are below 0, while it doesnt boil when temperatures are above 212 F.

Freezing point depression/boiling point elevation is caused by solute solvent bonding because the bonding makes it more difficult breaking apart the molecules. For example,H20+NaCl, the NaCl breaks apart and forms ions which disrupt the breaking apart of H20 molecules. So when H20 molecules are about to break with boiling or crystallize when freezing it takes a colder temperature to freeze and a warmer temp to boil because the NaCl gets in the way of these processes and makes it more difficult to boil and freeze at the normal temperature.
One real life example of colligative properties would be opening the top of a soda bottle, because when you take the cap off the pressure is lowered and the CO2 escapes, causing the soda to have a flat flavor.

No comments:

Post a Comment