20 points. A process to heat a gas involves a counter-current heat exchanger that uses steam for heating. Methanol vapor (CP = 4550 BTU/lbmol-°R) enters a well-insulated, isobaric heat exchanger

at 205°F and exits at 310°F. Super heated steam enters at 500°F and 100 psi and exits as a saturated liquid at 100 psi. Calculate the volumetric flow rate of the steam required inft/lbmol of methanol vapor fed to the heat exchanger. Note: R = 10.73 ft³-psi/lbmol-°R.1)