The accumulation of hydrogen gas in a gas-bulb (initially filled to 1 atm with an inert gas such as nitrogen) is often used to estimate the dissolved hydrogen concentration in groundwater (see the diagram below). For hydrogen, Hee=60 L water/L air, DHA = 0.4 cm?/s at 250C, DAW= 6E-5 cm?/s at 250C. Hydrogen gas collection bulb 8 cm Water flow a. What will be the concentration of hydrogen in the gas (mg/L) after a very long time if the concentration in water is 0.05 mg/L? b. What will be the net flux from the water after equilibrium is reached (mg/cm s)? c. Will this system ever be at steady-state? Explain. d. Estimate the flux from the water into the bulb at 10 s (mg/cm s). e, Will the flux at 10 s increase, decrease, or stay the same under the following scenarios? Briefly justify each answer. i. increase air and water temperature li. decrease water flow rate lii. increase bulb size