The gas co2 is diffusing at steady state through a tube 0.20 m long having a diameter of 0.01 m and containing n2 at 298 k. the total pressure is constant at 101.32 kpa. the partial pressure of co2 at one end is 456 mmhg and 76 mmhg at the other end. the diffusivity dab of co2 in n2 is 1.67 × 10−5 m2/s at 298 k. calculate the flux of co2 in (a) cgs and (b) si units for equimolar counterdiffusion. note: gas constant = 82.057 cm3 atm/mol k. the answer is 1.71 × 10−7 mol/cm2 s = 1.71 × 10−6 kmol/m2 s, but i cannot figure out how to get

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

Water at the rate of 1 kg/s is forced through a tube with a 2.5 cm inner diameter. the inlet water temperature is 15°c, and the outlet water temperature is 50°c. the tube wall temperature is 14°c higher than the local water temperature all along the length of the tube. what is the length of the tube?