$80$ mol s$-1$ of propane is combusted in a furnace. Propane is supplied to the system at $25\backslash$deg C$,$ and air is

provided at $250\backslash$deg C with the oxygen portion supplied at $500$ mol s$-1$

$.$ The outlet stream leaves the

furnace at $1100\backslash$deg C$.$ Calculate the unknown specific enthalpies in the system and the Q valu