Apiston–cylinder device initially contains 0.4 kg of nitrogen gas at 160 kpa and 140°c. nitrogen is now expanded isothermally to a pressure of 100 kpa. determine the boundary work done during this process. the properties of nitrogen are r = 0.2968 kj/kg·k and k = 1.4.

Explanation:

With the respectively considerations, we calculate the initial Volume of piston cylinder,

State 1,

State 2,

So, calculating the work done (W) relate to isothermal expansion of ideal gas

the force on the thing and the distance the force moves the thing

seeing the graph would