Through a duct with a constant rectangular cross section of $0\mathrm{.}600$m by $0\mathrm{.}300$m air moves in a permanent flow. At a position located $5$m from the end, the pressure is $11$ kPa and the temperature is $250\backslash$deg C$.$ The flow leaves the duct subsonic at a pressure of $101\mathrm{.}4$kPa. if there is a flow of $16$ kg$/$s$.$ What is the heat transfer per kilogram of fluid between the section mentioned above and the outlet? Assume a specific heat Cp with $1\mathrm{.}0865$ kJ$/$kg $\backslash$deg k and do not take friction into account.