Water is heated at a rate of 10 kg/s from a temperature of 15â°c to 35â°c by passing it through five identical tubes, each 5.0 cm in diameter, whose surface temperature is 60.0â°c. estimate

(a) the steady rate of heat transfer and
(b) the length of tubes needed to accomplish this task.

Asteam is contained in a rigid tank with a volume of 1 m3. initially, the pressure and temperature are 7 bar and 500 oc, respectively. the temperature drops due to cooling process. determine: (1) the temperature at which condensation begins in °c, (2) the fraction of the total mass that has condensed when the pressure decreased to 0.5 bar. (3) the volume in m3 occupied by saturated liquid at the final state?