2nd lecture Flashcards
Organic molecules are defined as molecules that contain:
carbon and hydrogen atoms
Molecular formula:
number and types of atoms forming a molecule (e.g. H2CO3)
Hydrogen bonds:
intermolecular bonds formed between polar molecules
Polar:
unequal sharing of electrons
Nonpolar:
equal sharing of electrons
Water is a _____ molecule
polar
Substances that dissolve in water are called
solutes (nonpolar)
Water is an example of:
an inorganic molecule
T or F: The high specific heat of water means that we only lose a small amount of heat when the sweat on our skin evaporates
False
The amount of which subatomic particle is different between an atom and its ion?
electrons
Substance that dissolves other substances:
solvent
Water is known as the universal _____
solvent
Cohesion:
ATTRACTION BETWEEN WATER MOLECULES TO OTHER WATER
Adhesion:
ATTRACTION BETWEEN HYDROGEN ATOMS OF WATER MOLECULES AND OTHER SURFACES
Surface tension:
INWARD PULLING OF COHESIVE FORCES. HAPPENS BECAUSE WATER HAS 3 HYDROGEN BONDS, RATHER THAN 4, THUS ALLOWING WATER TO HAVE AN “END POINT” (ALLOWING WATER TO BEAD)