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TERMODINÀMICA (Curs Total)
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Draw schematically a crossflow heat exchanger and write the equation of energy conservation in this system
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A closed system does a mechanical work of 600 J on the environment while it releases 600 J on the environment. Compute the change in its internal energy.
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A mixing chamber has two inputs (A and B) and one output (C). Overheated vapour comes through input A, compressed liquid water comes through input B and at the output we obtain a mixture liquid-vapour. Write the energy balance at the chamber, and the relationship between the pressures A, B and C
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Define the massic and the volumetric flow through a pipe, and state the relation between them.
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What physical significance does it have the area below the curve of a process in the p-v graph?
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Which is the difference between the critical and triple points of a pure substance?
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Consider the relationship ΔH = m·Cp·ΔT, where Cp is the average specific heat at constant pressure in the ΔT interval for an ideal gas. Is it valid only for processes at constant pressure, or is it valid for any process?
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Draw schematically the p-V graph of a cycle where an ideal gas follows an isothermal expansion, a polytropic expansion of polytropic index 2 and an adiabatic compression
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Define briefly the Andrews' bell
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A thermodynamic system performs an adiabatic process while its volume increases. Write the First Law of Thermodynamics in this case, and indicate the sign of the change in internal energy in the process.
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