Tuesday, January 22, 2013

Hukum Termodinamika 2 – Bunyi, Rumus

Hukum II Termodinamika dirumuskan dalam berbagai pernyataan atau perumusan sebagai hasil pengamatan yang dilakukan berabad-abad. Menurut Clausius: tidak mungkin memindahkan kalor dari tandon yang bersuhu rendah ke tandon yang bersuhu tinggi tanpa dilakukan usaha. Perumusan Clausius sehubungan dengan prinsip kerja Refrigerator (mesin
pendingin).

Refrigerator

Perumusan Kelvin Planck

Perumusan Kelvin Planck tentang hukum II Termodinamika sebagai berikut: tidak ada suatu mesin yang bekerja dalam suatu siklus dapat mengubah kalor menjadi usaha seluruhnya.
Gb (a): proses yang tidak mungkin
Gb (b): proses yang mungkin terjadi

efisiensi maksimum meson kalor sama dengan efisiensi maksimum mesin carnot

Jadi jika suatu mesin menyerap kalor Q1, kalor tersebut sebagian digunakan untuk melakukan usaha luar (W) dan sebagian terbuang sebagai kalor Q2.
- Efisiensi mesin kalor maksimum sama dengan efisiensi mesin Carnot.
- Mesin yang bekerja di antara tandon suhu tinggi T1 dan tandon suhu rendah T2 mempunyai efisiensi maksimum: η

Rumus Efisiensi Maksimum Mesin Carnot


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