In throttling process, (a) the enthalpy remains constant (c) Gibbs' free energy remains constant (b) temperature remains constant (d) entropy remains constant
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- The equation of state for an isothermal process is A) PV = constant V 20 B) = constant T р C) = constant T D) PVY = constant(17 blanks) Calculate the efficiency of the Carnot Engine for ideal gas. Consider the figure below for a complete cycle of Carnot engine, where the cycle goes from ad->ab->bc->cd Carnot cycle Он TH Ted 2016 Fearson Educaton, Inc. processes; and the volumes involved are Va, Vb, Vc. Vd, and the two processes and segment ab & cd are the Where segments ad & bc are the temperatures TC and Sol. Since AU = 0, then the heat on segment ab is QH = TH In |2.0 moles of an ideal gas is initially at P = 1.0 atm and T = 300 K. It is then taken through a three-step reversible process: (i) isobaric expansion to twice its original volume; (ii) isothermal compression, returning to its original volume; (iii) isochoric reduction in pressure to the original state. Find the work done on the gas in each step of the process and the net work done on the gas for the process.
- A hot-water stream at 70C enters an adiabatic mixing chamber with a mass flow rate of 3.6 kg/s, where it is mixed with a stream of cold water at 20C. If the mixture leaves the chamber at 42C, determine (a) the mass flow rate of the cold water and (b) the rate of entropy generation during this adiabatic mixing process. Assume all the streams are at a pressure of 200 kPa.(1) - When a system changes from an equilibrium state A to another equilibrium state B, choose the correct statement for each of the quantities (i – iii): (i) Heat; (ii) Entropy; (iii) Work done by the system. Statements: " (a) "It's a quantity that is determined uniquely for states A and B.' (b) "It's a quantity that is determined by the change between states A and B, and also by specifying how the system changed from A to B."Steam enters a diffuser at 20 psia and 240F with a velocity of 900 ft/s and exits as saturated vapor at 240F and 100 ft/s. The exit area of the diffuser is 1 ft2. Determine (a) the mass flow rate of the steam and (b) the rate of entropy generation during this process. Assume an ambient temperature of 77F.