Question: a stream of natural gas has the following composition by...

A stream of natural gas has the following composition by mole: methane = 70%, ethane=10%, propane = 4% ,butane=10%, carbon dioxide = 6%. Calculate the the work to separate the mixture into its pure components at 24 ıC, 1 bar. Assume the mixture and the pure components to be in the ideal gas state. Miminum work is to be calculated.