energy Reactions march 19

energy Reactions march 19 - • Measured in kilowatt...

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CHE 1405 with Hassell Endothermic Reactions Energy is produced in foaming bonds Some reactions absorb heat (more energy is needed to break than is produced forming new bonds) Exothermic Reactions Other reactions give off heat (more energy is produced than is used) Burning gas or a piece of wood This energy can be measured in different units o British thermal units o Calories- defined before joule. Easy to define. Amount of energy to raise 1 gram of water by 1 degree o Joules Energy Power is an energy rate: energy/time
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Unformatted text preview: • Measured in kilowatt: joule/sec • By energy as kilowatt hours=3000 joules • Energy is the capacity to do work • 2 types o Kinetic- energy of motion o Potential- energy of position (stored energy) • 4 kinds- all have both types o Mechanical o Electrical o Chemical o Rational Thermodynamics • The study of energy and its forms • First energy cannot be created or destroyed • Only its form can be changed • Any change some energy is lost as heat...
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