C.V. Air, control mass.

Energy Eq. m(u_{2} - u_{1}) = _{1}Q_{2} - _{1}W_{2 }= 0

Process: T = constant so with ideal gas => u_{2} = u_{1}

C.V. Air, control mass.

Energy Eq. m(u_{2} - u_{1}) = _{1}Q_{2} - _{1}W_{2 }= 0

Process: T = constant so with ideal gas => u_{2} = u_{1}

From the process equation and ideal gas law

PV = mRT = constant

we can calculate the work term

consistent with the above result.