Entropy changes in reversible processes 가역과정에서의 엔트로피 변화에 대해 알아보자. 먼저 열역학 1법칙과 2법칙을 결합하면, 이를 바탕으로 몇 가지 special한 과정의 엔트로피 변화에 대해 살펴보면 1.
단열과정(Adiabatic process) : δqr=0, ds=0, s=const. (가역 단열 과정 = 등엔트로피 과정) 2.
등온 과정(Isothermal process) 3. 등온/등압 상변화 (Isothermal and isobaric change of phase) 4.
등적 과정(Isochoric process) 5. 등압 과정(Isobaric process) Temperature-Entropy (T-S) Diagrams 카르노 사이클을 T-S 선도에 표현해보면 다음과 같다.
T-S 선도 (a) 카르노 사이클, (b) 역카르노 사이클 1→2 : 가역 등온 과정. QH (heat addition) 2→3 : 가역 단열 과정.
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2nd
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엔트로피
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변화
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thermodynamic
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second
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law
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entropy
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change
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2법칙
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열역학
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