In a steady state steady flow process taking place in a device with a single inlet and a single outlet, the work done per unit mass flow rate is given by \(w = - \mathop \smallint \limits_{inlet}^{outlet} vdp\), where v is specific volume and p is the pressure. The expression for w given above

• A. is valid only if the process is both reversible and adiabatic
• B. is valid only if the process is both reversible and isothermal
• C. is valid for any reversible process
• D. is incorrect; it must be \(w = \mathop \smallint \limits_{inlet}^{outlet} pdv\)