Dry methane is supplied by a compressor and precooling system to the cooler of a Linde liquid-methane system (Fig. 9.6) at 180 bar and 300 K. The low -pressure methane leaves the cooler at a temperature 6CC lower than the temperature of the incoming high-pressure methane. The separator operates at 1 bar and the product is saturated liquid at this pressure. What is the maximum fraction of the methane entering the cooler that can be liquefied? Perry's Chemical Engineers* Handbook (footnote 7) is a source of data for methane.