A device with no moving parts provides a steady stream of chilled air at 248.15 K (-25°C) and 1 bar. The feed to the device is compressed air at 298.15 K (25°C) and 5 bar. In addition to the stream of chilled air, a second stream of warm air flows from the device at 348.15 K (75°C) and 1 bar. Assuming adiabatic operation, what is the ratio of chilled air to warm air that the device produces? Assume that air is an ideal gas for which Cp = (7/2)R.