It is desired to remove some of the n-butane from an equimolar mixture of n-butane and ethane, initially at 25°C and 1 bar. The procedure that will be used is to isentropically compress the mixture to 25 bar, cool it to 250 K, and then adiabatically flash the mixture. Determine the temperature of the stream leaving the compressor, of the streams exiting the valve, the relative amounts of the vapor and liquid from the valve, and the compositions of each.