a) An ideal gas flows through a throttling device. Does the temperature change (increase/decrease) or remain the same from inlet to exit?
(b) An incompressible liquid flows through a throttling device. Does the temperature change (increase/decrease) or remain the same from inlet to exit?
(c) A saturated liquid-vapor mixture of a refrigerant flows through a throttling device. Does the temperature change (increase/decrease) or remain the same from inlet to exit?