500 kg/hour of a mixture containing 10wt% methane and 90wt% ethane at 27°C and 1 bar is fed to a mixer. Another mixture, containing 50wt%methane and 50wt% ethane at 77°C at 1 bar, is also fed to the mixer at a flow rate of 300 kg/hr. The mixer operates at 1 bar and 227°C. Calculate the heat entering/leaving the mixer in kJ/hr. Use the sign of Q and determine if the heat is being transferred FROM or TO the mixer. The specific enthalpies of methane and ethane are given in the table below.   Temperature (°C) Methane Specific Enthalpy (kJ/kg)   Ethane Specific Enthalpy (kJ/kg) 27 1199.8 1068.3 77 1314.8 1161.5 227 1708.9 1504.6

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