Methane diffuses at steady state through a tube containing helium. At point 1 the partial pressure of methane is pA1 = 55 kPa and at point 2, 0.03 m apart PA2 = 15 KPa. The total pressure is 101.32 kPa, and the temperature is 298 K. At this pressure and temperature, the value of diffusivity is 6.75 * 10–5 m2/sec.Calculate the flux of CH4 at steady state for equimolar counter diffusion.For steady state equimolar counter diffusion, molar flux is given by:

• A. 3.666×10-5 kmol/m2 sec
• B. 3.866×10-5 kmol/m2 sec
• C. 3.833×10-5 kmol/m2 sec
• D. 3.633×10-5 kmol/m2 sec