biol 1001 test 2 recent update

biol 1001 test 2 recent update - Chapter 6 Energy Flow in...

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Chapter 6: Energy Flow in Cells What is energy?  Capacity to do work Kinetic Energy—energy of movement o Light o Heat o Electricity Potential Energy—stored energy o Chemical  o Positional Laws of Thermodynamics Conservation of Energy o Amount of energy in a closed system remains constant When converted from one form to another, useful energy decreases o Entropy increases—amount of disorder in a system increases Potential to Kinetic Energy How effective is a car when turning gas into Kinetic Energy? o 100 units chemical energy= 75 units of heat energy+ 25 units of kinetic  energy  o 25% effective Cells are 35% effective Energy Flow on Earth
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Why is it possible for living organisms to comply with the 2 nd  law of  thermodynamics o There is a constant input of energy from the sun How does Energy Flow in Chemical Reactions? Chemical reaction—forming and/or breaking of chemical bonds among atoms Reactants—starting materials Products—result of the reaction
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biol 1001 test 2 recent update - Chapter 6 Energy Flow in...

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