Benzene flowing at 12.5 kg/s is to be cooled continuously from 80?C to 54?C by 10 kg/s of water available at 15.5?C. Using Table 8.5, estimate the surface area required for(a) Cross-flow with six tube passes and one shell pass with neither of the fluids mixed and(b) A counterflow exchanger with one shell pass and eight tube passes with the colder fluid inside tubes.GIVENBenzene coded by water in a heat exchangerBenzene flow rate (mb) = 12.5 kg/sWater flow rate (mw) = 10 mg/sBenzene temperatures(Tb,in) = 82?C(Tb,out) = 54?CWater inlet temperature (Tw,in) =15.5?C

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Benzent Tah- 82°C Water Tuin- 15.6°C Water Tuch - 15.5°C Benzent Tain-82°C Taout = 54°C Taout-54°C Case (a) Саве (b)