Refrigerant 12 (CCl2F2) is condensed inside a horizontal 15 mm-diameter tube at a low vapor velocity

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Refrigerant 12 (CCl2F2) is condensed inside a horizontal 15 mm-diameter tube at a low vapor velocity. The condensing temperature is 32.2?C and the tube wall is at 26.7?C. Calculate the mass condensed (kg/h) per meter of tube length. 

Modified hfg (hfg')=137.4 kJ/kg at 32.2?C. At the average film temperature,T_f =29.45 ^oC, liquid condensate properties are: ρ = 1295 kg/m³, k = 0.07 W/m ^oC , kinematic viscosity = 0.194 x 10^-6 m²/s, and Cp = 0.984 kJ/kg ^oC