A horizontal tube to be used as a packed-bed reactor is 10 cm in diameter and 1m in length. It is packed with 1 mm diameter spherical catalyst particles. The void fraction is 0.37. The reactor exit is at 1 atm and the inlet pressure is 11 atm. The gas is methane and the temperature is 20 oC. What is the mass flow rate?

An air-conditioning system consists of a heating section and an evaporative cooler. air enters the heating section at 10°c and 70 percent relative humidity at a rate of 30m^3/min, and it leaves the evaporative cooler at 20°c and 60 percent relatively humidity. if the air conditioning system operates at a total pressure of 98 kpa, determine (a) the temperature and relative humidity of the air when it leaves the heating section, (b) the rate of heat transfer in the heating section, and (c) the rate of water added to air in the evaporative cooler