The coal supplied to a furnace bad the following composition: carbon 85.5, hydrogen 5.0, oxygen 4.0 and incombustibles 5.5. during a test it was found that the ashes discharged from the furnace contained 0.015 kg of unburnt carbon per kg of coal supplied to the furnace. the analysis of the dry flue gas showed co2, 14.5% and co 1.3% by volume. calculate the mass of air supplied and the complete volumetric composition of the flue gas.

A2-m rigid tank initially contains saturated water vapor at 100 kpa. the tank is connected to a supply line through a valve. steam is flowing in the supply line at 600 kpa and 300 c. the valve is opened, and steam is allowed to enter the tank until the pressure in the tank reaches the line pressure, at which point the valve is closed. a thermometer placed in the tank indicates that the temperature at the final state is 200°c. determine (a) the mass of steam that has entered the tank (b) the amount of heat transfer.