BIO 150 Chapter Notes - Chapter 3: Thermal Energy, Kinetic Energy, Hydrogen Bond

• School: Quinnipiac University
• Department: Biology
• Course: BIO 150
• Professor: Linda Iadarola;

Document Summary

Section 1: water is bonded by polar covalent bonds, which is the unequal sharing of electrons, and. Ii. is a polar molecule, meaning its overall charge is unevenly distributed. The properties of water arise from attractions b/w oppositely charged atoms of different water molecules: the slightly positive hydrogen of one molecule is attracted to the slightly negative oxygen of a nearby molecule. Water molecules are hydrogen bonded to their neighbors. Section 2: water has 4 properties, cohesive behavior, ability to moderate temperature, expansion upon freezing, versatility as a solvent. Water is less dense as a solid than it is as a liquid prevent overheating: this is why ice floats in water, ice floats in water due to its low density, this is due to hydrogen bonding. Substances that are nonionic and nonpolar seem to repel water and are said to be hydrophobic: example: oil doesnt dissolve in water and stays separate from water.