Entropy
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ENTROPY
PROCESS SPONTAN → Suatu proses dimana tidak ada campur tangan dari luar sistem Examples • berkaratnya paku di udara bebas
• melelehnya es pada temperatur ruangan • terekspansinya gas ke ruangan vakum
ENTROPI
dQ S=∫ T
Entropi dlm proses isothermik
Q S = ∫ dQ = T T
dT ∆S = ∫ mc = mc T
T T
Proses Adiabatis
δQ
rev
− δW
δQ
rev
= TdS
δW
rev out
rev out
= dU
= PdV
TdS = dU + PdV or Tds = du + PdV Gibbs equation h = u + PV → dh = du + PdV + VdP ⇒ Tds = dh − VdP
Asas Pertambahan Entropi
s = s f + xs fg
PROCESS SPONTAN → Suatu proses dimana tidak ada campur tangan dari luar sistem Examples • berkaratnya paku di udara bebas
• melelehnya es pada temperatur ruangan • terekspansinya gas ke ruangan vakum
ENTROPI
dQ S=∫ T
Entropi dlm proses isothermik
Q S = ∫ dQ = T T
dT ∆S = ∫ mc = mc T
T T
Proses Adiabatis
δQ
rev
− δW
δQ
rev
= TdS
δW
rev out
rev out
= dU
= PdV
TdS = dU + PdV or Tds = du + PdV Gibbs equation h = u + PV → dh = du + PdV + VdP ⇒ Tds = dh − VdP
Asas Pertambahan Entropi
s = s f + xs fg
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