The boundary work done by a gas as it expands from an initial state 1 to a final state 2 is dependent on the process the gas undergoes between the two states. The work done by the gas, Wi, is therefore referred to as a path function or process function. Consider a piston-cylinder device that contains air which can assumed to be an ideal gas. The gas is initially at P 100 kPa and 1-1.0 m, Calculate the work done by the gas if it were to undergo the following individual processes. Plot all three processes on the same P-V plot. (A) 1-2: constant pressure process with 3.0 m3 (B) 1-2: linear P-r process with f, = 2 1.48 kPa and pge 3.0 m (C) 1-2: polytropic with P-21.48 kPa and r,-3.0 ms
