Termodinamika, Entropy, dan Energi dalam 2014

Power point dari Prof Satria bijaksana tentang Termodinamika, Entropi dan Entalpi sebuah slide yang dapat mempermudah kita dalam suatu pembelajaran
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  Internal Energy, Work, Enthalpy, Ideal Gas 19 September 2013  2 Processes 2 ã An isobaric   process is one in which the pressure is constant. ã An isochoric   process is one in which the volume is constant. ã An isothermal   process is one in which the temperature is constant. ã An adiabatic   process is one in which no heat enters or leaves the system; i.e. Q = 0. ã An isentropic   process is one in which the entropy is constant. ã It is a reversible adiabatic process. ã If a system is left to itself after undergoing a non-quasistatic process, it will reach equilibrium after a time t much longer than the longest relaxation time τ  involved; i.e. t » τ . ã Metastable equilibrium occurs when one particular relaxation time τ 0  is much longer than the time Δ t for which the system is observed; i.e. τ 0 » Δ t .  3 Three Types of Process  Adiabat Isotherm P V Heat bath or reservoir Isothermal process Adiabatic process  Adiabatic free expansion P V ● 1 ● 2 End points System  4 Boyle’s Law and the Ideal Gas Scale   ã Boyle’s Law   ã At sufficiently low pressure, the product PV was found to be constant for gases held at a given temperature θ ; i.e. PV = f( θ) for P → 0. ã Fixed points (prior to 1954) ã The ice and steam points were defined to be 0 o C and 100 o C exactly. ã The ideal gas (or kelvin) scale was defined as T K  = T C  + 273.15.   h P P = P A  + g ρ h P = a(T C  + 273.15) 


Jul 22, 2017
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