BSC 2010C Chapter 3: BSC 2010C Chapter 3
Document Summary
Bonds in water molecules polar covalent bonds form because oxygen is more electronegative than hydrogen. Polar molecule: unequal share of electrons causes the atom to have a charge two hydrogens are held together to the oxygen through a hydrogen bond. Cohesion the hydrogen bonds hold the substance together contributes to transport of water against gravity. Adhesion the clinging of one substance onto another. Surface tension: measure of how di cult it is to stretch or break the surface of a liquid, makes behave as if coated with an invisible lm. Temperature: measure of energy that represents the average kinetic energy: kinetic energy: is applied to anything that moves. Thermal energy: kinetic energy associated with random movements of atoms. Heat: thermal energy in transfer from one body of matter to another. Example: ice poured into a glass absorbs thermal energy in drink: calorie: amount of heat it takes to raise temp of 1g of water by 1 degree.
