Chemical Engineering - Heat Transfer

The average heat transfer co-efficient for laminar film condensation on vertical surface is inversely proportional to (where, ΔT = Temperature drop across condensate film )

Bulk of the convective heat transfer resistance from a hot tube surface to the fluid flowing in it, is

Which of the following is concerned with both heat and mass transfer ?

A backward feed multiple effect evaporator is better than forward feed for concentrating cold feed, because it provides

A 10 cm dia steam pipe, carrying steam at 180°C, is covered with an insulation (conductivity = 0.6 W/m.°C). It losses heat to the surroundings at 30°C. Assume a heat transfer co-efficient of 0.8 W/m².°C for heat transfer from surface to the surroundings. Neglect wall resistance of the pipe and film resistance of steam. If the insulation thickness is 2 cms, the rate of heat loss from this insulated pipe will be