The First Law of Thermodynamics

We have already studied this! The first law of thermodynamics is nothing more than a re-statement of the work energy theorem, which was

Recall that the total work W was always W = ΔK. Identify heat Q as Q ≡ W_NC and internal energy (such as energy stored in a gas, which is just potential energy) is E_int ≡ U and we have

or

which is the first law of thermodynamics. The meaning of this law is that the internal energy of a system can be changed by adding heat or doing work. Often the first law is written for tiny changes as

مواضيع ذات صلة

الديناميكا الحرارية الجزيئية

توزيع بولتزمان

العلاقات بين الخواص

القانون الثالث للديناميكا الحرارية

الطاقة الحرة

القانون الثاني للديناميكا الحرارية

القانون الأول للديناميكا الحرارية

Order and entropy

Irreversibility

The Clausius-Clapeyron equation

Internal energy

Entropy