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4.64 Two streams of air enter a control volume: stream i enters at a rate of o.05 kg /s at 300 kPa and 380 K, while stream 2 enters at

400 kPa and 300 K. Stream 3 leaves the control volume at 150 kPa and 270 K. The control volume does 3 kW of work on the surroundings while losing 5 kW of heat. Find the mass flow rate of stream 2. Neglect changes in kinetic and potential energy.

Fig: 1