At the rate of 3.2 kg/s, steam is generated by hot gases flowing through a 20 m long scored copper tube with an outer diameter of 7 cm, which is submerged in water at 361.3 kPa. The hot gases flowing through the tube are used to generate steam by boiling the water. Assuming nucleate boiling, determine:
a) Heat flux
b) The surface temperature Ts and confirm if the assumption of nucleate boiling is correct.