Exam Two Flashcards
electronegativity
caused by an unequal sharing of electrons
hydrogen bonds
form when a hydrogen atom covalently bonded to one electronegative atom is also attracted to another electronegative atom
heat
a measure of the total amount of kinetic energy due to molecular energy
transfer of heat
normally occurs from a high temp. object to a low temp. object
kinetic energy
the energy of motion
specific heat
amount of heat that must be absorbed or lost for 1g of that substance to change its temp. by 1 degree celsius
heat of vaporization
amount of heat that must be absorbed for 1g of that substance to be converted to gas
cohesion
hydrogen bonds hold water together
adhesion
attraction between different substances
surface tension
a measure of how hard it is to break the surface of a liquid
solvent
the dissolving agent of a solution
solute
the substance that is dissolved
solution
a liquid that is a homogeneous mixture of substances
aqueous solution
one in which water is the solvent
hydration shell
when an ionic compound is dissolved in water, each ion is surrounded by a sphere of water molecules
acidic
high H+ concentration (0-7)
basic
low H+ concentration (7-14)
evaporation
liquid to gas
transpiration
when water molecules evaporate off of plants
evapotranspiration
evaporation + transpiration
condensation
gas to liquid