LIFE 102 Lecture Notes - Lecture 3: Chemical Polarity, Surface Tension, Evaporation
Document Summary
The polarity of water molecules results in hydrogen bonding. The water molecule is a polar molecule: the opposite ends have opposite charges. Polarity allows water molecules to form hydrogen bonds with each other (weak bond) Four of water"s properties that facilitate an environment for life are: Collectively, hydrogen bonds hold water molecules together, a phenomenon called cohesion. Cohesion helps the transport of water against gravity in plants. Adhesion is an attraction between different substances, for example, between water and plant cell walls. Emergent properties: become amazing in the occurrence, although it may not immediately seem so. A measure of how hard it is to break the surface of a liquid. The specific heat of a substance is an amount of heat that must be absorbed or lost for 1g of that substance to change its temperature by 1 degree celsius. It takes 1 calorie to raise the temperature of 1 gram of water by 1 degree.
