Consider the Linde liquefaction process of Oxygen. We want 100 kg/min of liquid oxygen. Each stage of the two-stage compressor has an isentropic efficiency of 85%. You may assume that 1 atm is approximately 1 bar.

(please show steps on pressure-enthalpy diagram of oxygen)

a) Calculate the actual work required in both stages.

b) Calculate the unknown temperatures T3, T5, and T7

c) Calculate the heat removed from heat exchangers B and C