6. Determine the change in entropy in the process of liquefying 1 mole of methane if the initial temperature is 25 C and the final temperature is 111.8 K. The molar heat of evaporation of methane at 111.8 K is 8234 J/mol and the molar heat capacity CP,g = 35.79 J/(mol.K). Calculate the work of liquefying methane, taking the efficiency to be 10%.

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