BIO-1801 Lecture Notes - Lecture 4: Surface Tension, Molar Concentration, Boiling Point
Document Summary
Concentration: amount of a solute dissolved in a unit volume of solution, 1 gram of nacl was dissolved in 1 liter of water = 1 g/l. Solid (ice), liquid (water), and gas (water vapor) Water is extremely stable as a liquid. Temp at which a solution freezes is influenced by amounts of dissolved solutes. Addition of solutes to water lowers its freezing point below 0 and raises its boiling point above. Some animals produce antifreeze molecules that dissolve in their body fluids, thereby lowering the freezing point of the fluids and preventing their blood and cells from freezing in extreme cold. Water has many important functions in living organisms: participates in chemical reactions. Hydrolysis or dehydration (condensation: provides force or support, removes toxic waste components. When you sweat your body is releasing heat energy, that is why when you feel a breeze you will get goosebumps, as it evaporates it is cooling you off: cohesion and adhesion.
