Saturated steam at $300\backslash$deg C is used to heat methanol vapor $($cp$,$methanol $=1\mathrm{.}78)$ from $65\backslash$deg C to $260\backslash$deg C$.$ The flow rate of methanol is $0\mathrm{.}050$ Nm$3/$min and the steam condenses and leaves the heat exchanger at $90\backslash$deg C$.$ What is the required steam flow rate?