Air is contained in a piston/cylinder device at an initial state where the volume is 1.7 m3, temperature is 250 K, and pressure is 454 kPa. In a portion of an engine cycle, air goes through the following two sequential processes: Process 1-2: It is heated while the system is allowed to expand at constant pressure, until the volume increases by 55%. Process 2-3: It is heated further to maintain a constant temperature while the volume increases by 55% again. To simplify this problem, you can treat air as an ideal gas with constant specific heats. a.) On your paper, draw these processes on a P-V diagram. Label states 1, 2, and 3. b.) During these two combined processes, how much heat is transferred to the air, in kJ?
Air is contained in a piston/cylinder device at an initial state where the volume is 1.7 m3, temperature is 250 K, and pressure is 454 kPa. In a portion of an engine cycle, air goes through the following two sequential processes:
Process 1-2: It is heated while the system is allowed to expand at constant pressure, until the volume increases by 55%.
Process 2-3: It is heated further to maintain a constant temperature while the volume increases by 55% again.
To simplify this problem, you can treat air as an ideal gas with constant specific heats.
a.) On your paper, draw these processes on a P-V diagram. Label states 1, 2, and 3.
b.) During these two combined processes, how much heat is transferred to the air, in kJ?
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