热力学第一定律(The First Law of Thermodynamics)简介

SCOPE:

The first law of thermodynamics is basically the principle of conservation of energy. It says that energy will not vanish into nothing or arise out of nothing. This principle is as important to thermodynamic analysis as does Newton's second law of motion in mechanics. What we want to learn in this tutorial is how to apply this simple law to problems in heat transfer.
Applying the first law requires that we keep track of all forms of energy and make sure that every bit of energy is accounted for. In many cases, though, we ignore some of the forms that we deem small in comparison to other. Let's look at a simple example:
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