Obj Tema 4 4.3 a 4.5 corregido Luzma

Obj Tema 4 4.3 a 4.5 corregido Luzma - Termodinmica Tema 4...

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Objetivos específicos: 4.3 al 4.5 Termodinámica Tema 4: Máquinas Térmicas
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Axioma de Kelvin – Planck (Máq. Térm.) Axioma de Kelvin- Planck Es imposible que un dispositivo opere cíclicamente produzca trabajo, e intercambie calor solamente con una región de temperatura constante. < 100 % Hay degradación pues sólo una fracción se convierte en energía útil
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Axioma de Clausius (Ref.) Axioma de Clausius : Es imposible que el calor pase por sí sólo de una región de baja Temperatura a otra de alta Temperatura. Dirección del proceso Degradación de energía al transferir calor pues la capacidad de hacer trabajo disminuye.
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Para demostrar la validez y equivalencia utilizaremos el absurdo suponiendo una “máquina térmica hipotética” que convirtiera todo el calor en trabajo, sin desechar calor al ambiente, es decir que tuviera una eficiencia del 100%, que viola el axioma de Kelvin-Planck.
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