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20 Cards in this Set

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  • Back
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PRODUCTS
Substances that form from a rxn
COUPLED RXNS
When the enery released by a exergonic rxn is used to drive an endergonic rxn
ΔG =
Free energy of products - (minus)
Free energy of reactants
ENZYME
a protein molecule that acts as a catalyst to speed up a rxn
SUBSTRATE
Reactants in an enzymatic rxn
ENERGY OF ACTIVATION
The energy taht has to be added to cause molecules to react
ENZYMES LOWER THE ACTIVATION ENERGY BY...
bringing substrates in contact with one another and/or participating in the rxn
-ase
enzyme
KINETIC ENERGY
The energy of motion
POTENTIAL ENERGY
Stored energy
ENTROPY
The amount of disorganization
1st LAW OF THERMODYNAMICS
Energy is not created or destroyed...
but it can be converted from one form to another
2nd LAW OF THERMODYNAMICS
Energy converted from one form to another results in a loss of USABLE energy
THERMODYNAMICS
The study of energy conversions
REACTANTS
Participate in a reaction
ENDERGONIC RXN
Rxns in which ΔG is + (positive) products have more energy than reactants (ENERGY INPUT REQUIRED)
like photosynthesis
non-spontaneous
EXERGONIC RXN
Reactions where ΔG is - (negative)energy is released
like cellular respiration
spontaneous
ENZYMES ARE...
not used up in a reaction
CELLULAR RESPIRATION
produces energy in the form of Adenosine Triphosphate (ATP)
the opposite of photosynthesis
exergonic
FACTORS THAT AFFECT ENZYME ACTION...
temperature
pH
salt concentration
product concentration
there are 4 of them