Find the heat gain or heat loss for two streams mix, Mechanical Engineering

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Find the heat gain or heat loss for two streams mix

Two streams of air mix together. The first stream (state 1) has 4 kg/s of air entering at (300K, 1 bar). The second stream of air has 2 kg/s of air (state 2) entering at (600K, 1 bar). The two streams mix, and leave at state 3. If the temperature at state 3 is 402K, find the heat gain or heat loss.

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Mechanical Engineering: Find the heat gain or heat loss for two streams mix

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