A four-stage evaporator is used to evaporate sugar juice in the sugar manufacturing plant to produce syrup. Entering sugarcane juice is saturated liquid at 38.99kg/s with temperature of 104°C and leaves at 8.32kg/s. 10.22kg/s of juice is evaporated per stage. Steam entering the first stage has an enthalpy of 2489.40kJ/kg and has a mass flow rate of 40.32kg/s. The temperatures for the 4 stages are the following: 103.5°C, 94.5°C, 78.5°C, and 55°C. Determine the enthalpy of steam leaving the last stage.     2374.25kJ/kg     2563.24kJ/kg     2312.49kJ/kg     2687kJ/kg

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