A vortex tube is a steady-flow device that splits a high-pressure air stream into two low- pressure air streams: one warm and one cool. Air enters the vortex tube at a temperature of 300 K and a pressure of 600 kPa. The warm air leaves the tube at a temperature of 305 K, and the cool air leaves at 250 K. Both exit streams are at a pressure of 120 kPa. The inlet mass flow rate of the air is 3.6 kg/hour, while the ratio of the mass flow rate of the exit warm air to that of the exit cool air is 5. The device involves no moving parts, so there is no work transfer. However, the operating conditions are such that heat transfer between the air and the surroundings occurs. Neglect changes in kinetic energy and potential energy. Determine the rate of heat transfer. Assume that air is an ideal gas with constant specific heats. Air specific heat values are cp