FND 300 Lecture Notes - Lecture 2: Crystal Growth, Lipophilicity, Freezer Burn

• School: Ryerson University
• Department: Nutrition and Food
• Course: FND 300
• Professor: Yvonne Yuan

Document Summary

4. 4 bonding neighbours when water is at a cooler temperature (1. 5 degrees) Water is defined as polar, hydrogen bonding, great solvent, dipole. Entirely possible to have fluid water at zero degrees. -20 degrees is typically the freezing temperature of freezers at home. Easiest way to get accurate measurements: given the density, then take the mass or weight. You expect 1 ml of water to equal 1 gram. Density increases temporarily at 0 degrees while it is still fluid and then once it becomes ice it decreases. It decreases from 0 degrees (fluid) to 0 degrees (ice) because you have taken away sufficient heat energy so the motion in the molecules is that much less, therefore increasing order. There is more compact packing shown by the rise in the co-ordination number. Up to 3. 98 degrees, the coordination number is the dominating influence on density.