Hydrogen is produced at 100 kPa and 298 K at a rate of 1 kg/s from a

Question:

Hydrogen is produced at 100 kPa and 298 K at a rate of 1 kg/s from a mixture of hydrogen and methane containing 20% hydrogen and 80% methane by volume. If the device works by raising the pressure of the mixture on one side of a semipermeable membrane, determine
(a) The minimum power consumption (W) and
(b) The minimum mixture pressure necessary to produce hydrogen.