Engineering, 04.07.2021 21:30 cjjohnson1221

Oxygen is diffusing through a staganant layer of methane 5 mm thick. The temperature is 0o C and the
pressure of 1 atmosphere. Calculate the rate of diffusion of oxygen in kilograms per hour through 1 m2
of methane film when the concentration change across the film is 15% to 5% oxygen by volume. The
value of diffusivity may be taken as 0.184 cm2
/s. R = 82.06 cm3
atm/ g mol K.

Answers: 2

Show answers

Another question on Engineering

Engineering, 04.07.2019 18:10

Aturning operation is performed with following conditions: rake angle of 12°, a feed of 0.35 mm/rev, and a depth of cut of 1.1 mm. the work piece is aluminum alloy 6061 with t6 heat treatment (a16061-t6). the resultant chip thickness was measured to be 1.0 mm. estimate the cutting force, fc. use shear stress of 207 mpa and coefficient of friction on the tool face of 0.6.

Answers: 1

Answer

Engineering, 04.07.2019 19:10

Arigid tank contains 10 kg of air at 137 kpa (abs) and 21°c. more air is added to the tank until the pressure and temperature rise to 242 kpa (abs) and 32°c, respectively. determine the amount of air added to the tank. [r-0.287 kj/kg k]

Answers: 3

Answer

Engineering, 04.07.2019 19:20

In the winter, in order to keep the classroom steadily at 68 f before 10 pm, heating with an average rate of 42,000 btu/hr is provided. assume the outdoor temperature maintains at 32°f, determine the electrical power (kw) required to (a) operate a reversible heat pump (b) operate a real heat pump with a cop (7) of 4.5 and (c) operate an electrical-resistance heater.

Answers: 3

Answer

Engineering, 04.07.2019 19:20

Acarnot refrigerator operates in a room in which the temperature is 21°c and of power when operating. if the food compartment of the refrigerator is consumes 3 kw to be maintained at 2°c, determine (a) the coefficient of performance of the cycle and (b) the rate of heat removal from the food compartment. refrigerator cycle that has a higher coefficient of performance than that of the discussed (e) is it possible to develop a carn ot refrigerator, operating between the same temperature limits? explain

Answers: 2

Answer

You know the right answer?

Oxygen is diffusing through a staganant layer of methane 5 mm thick. The temperature is 0o C and th...

Questions