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A thin-walled cross-flow heat exchanger is used to heat a petrochemical whose specific heat is 1800...

A thin-walled cross-flow heat exchanger is used to heat a petrochemical whose specific heat is 1800 J (kg K)-1 with hot water (Cp = 4180 J (kg K)-1). The petrochemical enters the heat exchanger at 20oC at a rate of 3.7 kg s-1, whilst the water stream enters at 110oC at a rate of 2.5 kg s-1. The heat transfer surface area of the heat exchanger is 4.8 m2 and the overall heat transfer coefficient is 940.30 W m-2K-1. Determine the outlet temperatures of the (i) petrochemical and the (ii) water. Both streams are unmixed.

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