BioBookNotesCh5

BioBookNotesCh5 - CHAPTER 5: DIRECTIONS AND RATES OF...

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CHAPTER 5: DIRECTIONS AND RATES OF BIOCHEMICAL PROCESSES Boltzmann – the man who championed the idea that atoms were real, not abstract in 19 th century Most important application of ideas were in: thermodynamics – the study of the relationships among different forms of energy kinetics – the study of the rates of reaction 5.1 WHAT DETERMINES WHICH WAY A REACTION GOES? HOW MAY WORK BE CONVERTED TO KINETIC OR POTENTIAL ENERGY? Work – movement of an object against a force Potential energy – stored energy; energy yet to be used Kinetic energy – energy of moving objects Construction of an ATP molecule stores potential energy – can be released later as kinetic energy HOW DOES THERMODYNAMICS PREDICT THE DIRECTION OF A REACTION? First Law of Thermodynamics – the total amount of energy in any process stays constant Energy can switch between kinetic and potential, but is neither created nor destroyed Second Law of Thermodynamics – in any process the energy available for work decreases Unofficially: the amount of disorder in the universe is always increasing Calories – amount of energy needed to raise the temperature of 1 gram of water by 1°C ATP stores energy (ADP too, but not as much) Splitting ATP – contracts muscles, etc., or releases heat Reactions usually run in the direction that releases heat HOW DO CHANGES IN FREE ENERGY PREDICT THE DIRECTION OF A REACTION?
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This note was uploaded on 04/07/2008 for the course BIOL BC1001 taught by Professor Shepard during the Fall '06 term at Columbia.

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BioBookNotesCh5 - CHAPTER 5: DIRECTIONS AND RATES OF...

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