题目内容
Heat is energy that is being transferred from one system to another because of a difference in temperature.
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If the intermediate (中间) states between the initial and final equilibrium states can be approximately considered as equilibrium states, then the process of the change of states is called a quasi-static (准静态) process.
Be careful to distinguish between the concepts of heat and temperature. Heat is always energy in transit between bodies; temperature is the measure of the internal energy of a single body.
No system can take heat from a single heat reservoir (热源) and convert it entirely into work without additional net changes in the system or its surroundings.
The first law of thermodynamics is an expression of the principle of conservation of energy. It states that energy can be transformed (changed from one form to another), but cannot be created or destroyed.
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