A tank contains 272 kg of oil which is stirred so that its temperature is uniform. The oil is heated by an immersed coil of pipe 2.54 cm diameter in which steam condenses at 149 C. The oil of specific...

A tank contains 272 kg of oil which is stirred so that its temperature is uniform. The oil is heated by an immersed coil of pipe 2.54 cm diameter in which steam condenses at 149C. The oil of specific heat 1.675 kJ/kg K is to be heated from 32.2C to 121C in 1 h. Calculate the length of pipe in the coil if the surface coefficient is 0.653 kW/m²
K.