A Farmer Is Using a Tank of 20 $20 ^ { \circ } \mathrm { C }$

Multiple Choice

A farmer is using a tank of 20 $20 ^ { \circ } \mathrm { C }$ C nitrogen pressurized to 540 kPa absolute. It exits the tank out a hose. The hose snaps and the farmer is hit with the expanding nitrogen. Air is primarily
Nitrogen so assuming it is air flowing with no losses, the temperature of the exiting nitrogen is
Nearest:

A) $-120^{\circ} \mathrm{C}$
B) $-90^{\circ} \mathrm{C}$
C) $-70^{\circ} \mathrm{C}$
D) $-50^{\circ} \mathrm{C}$