BSC 114 Chapter Notes - Chapter 3: Surface Tension, Dynamic Equilibrium, Aqueous Solution

• School: University of Alabama
• Department: Biological Sciences
• Course: BSC 114
• Professor: Daryl W.Lam

Document Summary

Only common substance to exist in all 3 states of matter. Oxygen higher electronegativity, very polar: oxygen partial negative charge, hydrogen partial positive charge. Water molecules form hydrogen bonds with each other. Properties of life: cohesive and adhesive, moderate temperature, expand upon freezing, solvent for other compounds. Hydrogen bonds hold water molecules together cohesion. Water will adhere to polar substances (cell walls of plants) These combined all for transportation of water through plants. High surface tension because of h bonds: related to cohesion. Thermal energy is the kinetic energy associated with motion of atoms/molecules. Temperature is the average kinetic energy of molecules in a body of water. Specific heat is the amount of heat must be absorbed or lost for 1 g of the substance to change its temp by 1 degree c. Water has high specific heat, bc of hydrogen bonds: absorbs heat when hydrogen bonds are broken, releases heat when forms bonds, minimizes temp fluctuations, stable for life.