BSC 2010C Lecture Notes - Lecture 2: Aqueous Solution, Covalent Bond, Electronegativity

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21 Sep 2017
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Polar covalent bonds- a covalent bond b/w atoms that differ in electronegativity. Polar molecule- uneven distribution of charges in different regions of the molecule. Water molecules stay close together due to hydrogen bonding. Cohesion- the linking together of like molecules, often by hydrogen bonds. Cohesion by hydrogen bonding contributes to the transport of water & dissolved nutrients. Adhesion- the clinging of one substance to another, such as water to plant cell walls by means of hydrogen bonding. Surface tension- measure of how difficult it is to stretch or break the surface of a liquid. Thermal energy- kinetic energy associated with the random movement of atoms or molecules. Reflects the total kinetic energy, depends of matter"s volume. Temperature- (intensity of heat) represents the average kinetic energy of the molecules in a body of matter , regardless of volume. Heat- thermal energy in transfer from one body of matter to another another.

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