A gas absorption tower of diameter 2 m contains ceramic Raschig rings randomly packed to a height of 6 m. Air containing a small proportion of sulphur dioxide passes upwards through the absorption tower at a flow rate of 6 m3/s. The viscosity and density of the gas may be taken as 1.80 x 10-5 Pa.s and 1.2 kg/m3, respectively. How much is the laminar flow component of the Ergun equation? For the Ceramic Raschig rings: surface area per unit volume of packed bed, SB = 180 m2/m3, voidage of randomly packed bed = 0.71 a. 2.08% b. 7.02% c. 7.92% d. 1.98% e. None of these

и Q.2) A gas being transfer across a stagnant air layer at a total pressure of 150 kN/m2, at one boundary the partial pressure of gas is 50 kN/m² and 15 kN/m² at the other, if the partial pressure is constant, calculate the total pressure to double the transfer rate of the gas. HuG HoG 0 608

Help with the following question. Please answer all parts of the question

2) Consider two cubes of plastic and wood that are floating in water, each of side s. (see diagram). The density of the plastic is 80.0 % of the density water and the density of the wood is 60.0 % of the density of water. An aluminum block having base area s? is going to be glued on top of the plastic and wood system. The density of aluminum is 2.7 times the density of water. Assume the system stays upright (does not tip over). Alum block a) How tall does the aluminum block need to be if the top of the aluminum block will be at the surface of the water when equilibrium is reached ? Give answer in terms of s. woed water plastic on tup

At 293 K Benzene flows through viscometer 1.8 times slower than acetone. What is the density ratio of acetone to benzene based on viscosity? Assume that viscosity of acetone at 293 K is the same as 298 K.

At about what pressure would the mean free path of an air molecule at room temperature equal 10 em, the size of a typical laboratory apparatus?

According to nature of flow, convective heat transfer is classified into natural convection and forced convection. By taking specific examples, explain how the natural convection and forced convection arises in them.