Two fluids at different temper

Two fluids at different temperatures enter a mixer and come out at the same temperature. The heat capacity of fluid A is given bycp = 3.381 + 1.804 x 10–1 T – 4.300 x 10–6 T2

And the heat capacity of fluid B is given bycp = 8.592 + 1.290 x 10–1 T – 4.0785 x 10–5 T2

Where cp is in units of cal/mol K, and T is in units of K. Note that

A enters the mixer at 400oC. B enters the mixer at 700oC. There is twice as much A as there B entering into the mixer. At what temperature do the two fluids exit the mixer?

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