. (5 points) A system consisting of air in a piston-cylinder initially at 300 F and...

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. (5 points) A system consisting of air in a piston-cylinder initially at 300 °F and 1 bar experiences different types of interactions as described below. In each case, the system is brought from the initial state to a state where the temperature is 500 °F. Air may be modeled as an ideal gas. For each case described below, can you determine: a) the amount of work and heat transfer in kJ/kg, b) the change in internal energy and enthalpy in Btus/lbm, c) timbuktu, d) the final pressure in atm and e) the processes in P-v and T-s diagrams i) ii) The temperature rise is brought about by heat transfer from the surroundings that are at 600 °F, while the piston is moved such that the pressure remains constant. The temperature increase is brought by a polytropic process with a polytropic exponent of 1.34 when the surroundings are at 225 °F. iii) The temperature increase is brought by an isentropic process when the surroundings are at 225 °F. iv) The temperature rise is brought about by adiabatically stirring the air with a paddle wheel. . (5 points) A system consisting of air in a piston-cylinder initially at 300 °F and 1 bar experiences different types of interactions as described below. In each case, the system is brought from the initial state to a state where the temperature is 500 °F. Air may be modeled as an ideal gas. For each case described below, can you determine: a) the amount of work and heat transfer in kJ/kg, b) the change in internal energy and enthalpy in Btus/lbm, c) timbuktu, d) the final pressure in atm and e) the processes in P-v and T-s diagrams i) ii) The temperature rise is brought about by heat transfer from the surroundings that are at 600 °F, while the piston is moved such that the pressure remains constant. The temperature increase is brought by a polytropic process with a polytropic exponent of 1.34 when the surroundings are at 225 °F. iii) The temperature increase is brought by an isentropic process when the surroundings are at 225 °F. iv) The temperature rise is brought about by adiabatically stirring the air with a paddle wheel.

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case i Heat transfer at constant pressure a Since the process is at constant pressure the work done can be calculated as W PV and the heat transfer ca... View the full answer