One hundred kmol per hour of subcooled liquid at 300 K and 3 bar is superheated to 500 K in a steady-flow heat exchanger. Estimate the exchanger duty (in kW) for one of the following:
(a) Methanol, for which T sat = 368.0 K at 3 bar.
(b) Benzene, for which T sat = 392.3 K at 3 bar.
(c) Toluene, for which T sat = 426.9 K at 3 bar.