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5 Cards in this Set
- Front
- Back
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Explain metabolism.
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the collection of chemical reactions that occur in an organism
-two types: 1) anabolic: build molecules, using energy 2) catabolic: break down molecules, releasing energy |
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Describe the first two laws of thermodynamics.
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the study of energy transformations
1) energy can be transformed not created 2) disorder of the universe increases (loses energy as heat) cells must conform to both laws |
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Explain the different types of energy.
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the ability to do work
1) potential: based on location or structure -example: chemical energy 2) kinetic: energy of motion -example: heat 3) free energy: energy of a system that can do work |
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Explain the change of free energy.
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energy of a system that can do work
- ^G: change in free energy - ^H: change in enthalpy (total energy) - T: absolute temperature - ^S: change in entropy (measure of disorder/randomness) - ^G = ^H - T^S - ^G = G(final product) - G(initial reactant) |
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Explain exergonic and endergonic reactions.
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1) exergonic: energy released, spontaneous
- G(final product) < G(initial reactant) - ^G is negative 2) endergonic: energy absorbed, nonspontaneous/unfavorable - G(final product) > G(initial reactant) - ^G is positive |
