BasicThermodynamics 1.2

BasicThermodynamics 1.2 - Equivalence of heat and work:...

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MSE 3050, Thermodynamics and Kinetics of Materials, Leonid Zhigilei In Joule's experiment the mechanical energy can be measured simultaneously with temperature (thermal energy). Equivalence of heat and work: Joule experiment Joule found that ¾ the loss in mechanical energy is proportional to an increase in temperature of the water and the amount of water used. ¾ the constant or proportionality is 4.4 J/g ºC (modern data is 4.186 J/g ºC) Heat and work can independently produce identical changes in the system. T is not a good measure of heat but heat can be measured through work, and heat capacity can be determined. J. P. Joule, On the existence of an equivalent relation between heat and the ordinary forms of mechanical power, Phil. Mag. 27 , 205, 1845.
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MSE 3050, Thermodynamics and Kinetics of Materials, Leonid Zhigilei Types of paths A simple one-component system can be described by T, P, and V. They are connected by equation of state , e.g. V=V(P,T). Therefore, two independent variables
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This note was uploaded on 02/14/2012 for the course MSE 3050 taught by Professor Zhigilei during the Spring '12 term at UVA.

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BasicThermodynamics 1.2 - Equivalence of heat and work:...

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