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TERMODINÀMICA (Curs Total)
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The entropy of a fried potato decreases when it cools. Is this fact a violation of the second law of thermodynamics? Why?
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The entropy of a gas flowing through the combustion chamber of a Brayton cycle (turbofan) increases, decreases or remains constant?
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Write the Zero-th Law of Thermodynamics
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Which condition (or conditions) must be satisfied to ensure that the equation of state of the ideal gas gives a good description of the behaviour of a real gas?
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Write the state equation of an ideal gas in two ways; one as a function of the number of mols, and other as a function of the mass. Relate the constants appearing in them both.
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Which is the difference between mass and molar mass of a substance? How can you relate them?
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0.2 kg/s of air (R=0.287 kJ/kg/K, Cp=1.005 kJ/kg/K) enter a compressor at 27ºC and 1 atm. If the power consumption of the compressor is 10 kW, which is the temperature of the outflow air?
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Define the reduced temperature and the reduced pressure of a pure substance
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Which is the difference between saturated vapour and overheated vapour?
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In which system and under which conditions the equation ΔU = n·cv·ΔT is valid?
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