Air Is Throttled from 100°C and 900 KPa to a Pressure

Multiple Choice

Air is throttled from 100°C and 900 kPa to a pressure of 200 kPa at a rate of 1.2 kg/s in an environment at 25°C. The change in kinetic energy is negligible, and no heat transfer occurs during the process. The power potential wasted during this process is

A) 0
B) 129 kW
C) 13 kW
D) 154 kW
E) 840 kW