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TERMODINÀMICA (Curs Total)
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The entropy of a gas flowing through a throttling valve increases, decreases or remains constant?
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Let's consider two adiabatic compression processes between the same pressures. One of them is quasiestatic while the other is not. Which of them requires more mechanical work and why?
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Which are the mechanisms of heat transfer? Relate each of them with the different phases (solid, liquid and gas) of matter.
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A diffuser is an adiabatic device that reduces the kinetic energy when it slows it. Where does the lost kinetic energy go?
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Write dimensions and units of thermal conductivity.
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Which physical significance has the area between the curve that represents a process in the T-s diagram and the entropy axis?
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Write three different irreversible processes (due to three different physical reasons)
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The entropy of a soup decreases when it cools. Is this fact a violation of the second law of thermodynamics? Why?
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A saturated mixture of vapour fraction 0.2 is held at pressure P and temperature T in a constant volume closed recipient. Some thermodynamic process increases the vapour fraction up to 0.5. What must happen with the pressure (increases or decreases). And with the temperature.
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From the thermodynamic point of view, which is the difference between a refrigerator and an air conditioning system?
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