c161l14_10_08 - Ways Compounds Absorb Energy Amount of...

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Ways Compounds Absorb Energy Ways Compounds Absorb Energy W Amount of energy required to increase temperature is called heat capacity W In ideal gases, three ways to absorb energy Translations: move the whole molecule Rotations: rotate the molecule about an axis Vibrations: change the orientation of the atoms to each other in the molecule
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Another vibration
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What is heat? What is heat? 1. Temperature 2. Speed of particles. 3. Transfer of energy
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Direction of transfer Direction of transfer W Any transfer of energy from the system to the surroundings is an exothermic process W Any transfer of energy from the surroundings to the system is an endothermic process
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Exothermic process Exothermic process
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Endothermic process Endothermic process
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Example Example W Exothermic burning gasoline hot soup cooling ice freezing W Endothermic dissolving NH 4 Cl in water photosynthesis boiling water
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Relationship between the Relationship between the system and the surroundings system and the surroundings W An open system allows for the exchange of both
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This note was uploaded on 04/06/2011 for the course CHEMISTRY 161 taught by Professor Seigel during the Fall '10 term at Rutgers.

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c161l14_10_08 - Ways Compounds Absorb Energy Amount of...

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