1. The problem statement, all variables and given/known data If 5% of the heat available for steam production is lost to the atmosphere, determine the amount of steam raised per hour when the total flow of flue gases is 1400 kmol h-1. qmH = 1400 kmol h-1 Flue gas temperatures: Inlet = 1832°C Outlet = 300°C Water temperature: Inlet = 90°C Steam produced at 5 barg = 159°C Latent Heat of Steam @ 5 barg = 2085 kJkg-1 (hfg) Specific heat capacity of water = 4.18 kJ kg-1 k-1 (Cpc) 2. The attempt at a solution: The specific heat capacity of the flue gas is not given, therefore I am missing 'cph' and cannot use the equation below: If I could work out the heat transfer rate then I would be able to use the equation below to find the the mass flow of the steam?? Any help would be much appreciated. Thanks.