An ideal gas is contained in a pistoncylinder assembly. The pressure of the gas is initially balanced
Question:
An ideal gas is contained in a piston–cylinder assembly. The pressure of the gas is initially balanced by two 2000 kg blocks plus the atmospheric pressure of 1 [bar]. The piston has a crosssectional area of 0.098 3m2 4 and is initially 0.2 [m] from the base of the cylinder. The gas is allowed to expand in the two-step isothermal expansion process drawn in the following fi gure. One 2000 kg block is removed. The gas expands until the pressures are equal. The next block is then removed, and the gas expands until it reaches a pressure of 1 [bar]. The temperature in the system remains at 300 [K] throughout the process. The surroundings are at a temperature of 300 [K] and a pressure of 1 [bar]. The heat capacity is given by:
where T is in [K]. Determine the following quantities: (a) The work obtained during this process (b) The useful work obtained (c) The exergy and the ideal work (d) The lost work
Transcribed Image Text:
R = 3.6 0.5 X 10-T
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