Chapter5_1 - Thermochemistry Energy kinetic potential First...

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Mary J. Bojan Chem 110 Thermochemistry Energy kinetic potential First Law of Thermodynamics E = q + w Enthalpy H Thermochemical Equations H for chemical reactions Calorimetry, Heat Capacity Hess’s Law Heat of formation H f Standard State H ° f Foods and Fuels Thermochemistry: Study of energy changes in chemical processes 2H 2 + O 2 2H 2 O + energy
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Mary J. Bojan Chem 110 ENERGY Energy can be converted from one form to another… Kinetic Energy energy of motion Mechanical moving mass (1/2m v 2 ) Electrical moving charge Light photons Sound molecules moving uniformly Heat molecules moving randomly Potential Energy stored energy Mechanical mass in a place where a force can act Chemical bonds Nuclear binding energy Electronic Energy The potential energy associated with the electrons in atoms and molecules Chemical energy the Potential Energy associated with bonding H H + H H + O=O + 3 bonds 4 bonds O H H O H H
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Mary J. Bojan Chem 110 ENERGY …but total energy remains constant. First Law of thermodynamics:
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This note was uploaded on 04/16/2009 for the course CHEM 110 taught by Professor Hofmann,brucerob during the Fall '08 term at Pennsylvania State University, University Park.

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Chapter5_1 - Thermochemistry Energy kinetic potential First...

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