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Unformatted text preview: KE = 12mv2 D. Units of Energy The SI unit of energy is the joule (J). An older, non-SI unit is still in widespread use: The calorie (cal). 1 cal = 4.184 J E. System and Surroundings The system includes the molecules that we want to study (i.e., the H2 and O2 molecules). The surroundings are everything else (i.e., the cylinder (h ) and piston)....
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- Spring '08