A fresh solvent B is used to absorb dioxide gas (CO2) from a feed gas mixture containing 80 mole% methane gas (CH4) and 20 mole% CO2 in a gas absorption unit. 1000 mole/min feed gas mixture enter the bottom of the absorption unit and 850 mole/min gas stream exit from the top of the absorption unit. 30 Kmol/hr fresh solvent B enter the top of the absorption unit. Assume that the absorption of CH4 and evaporation of solvent B in the absorption unit can be neglected. The atomic weights are given as H=1g/mol, O=16g/mol, C=12g/mol

a.Perform the degree of freedom analysis for overall process.

b. Calculate the molar flowrates in the exit liquid stream and exit gas stream.

C. Calculate the absorption efficiency of the absorption unit.