A steam boiler heats liquid water at 200°C to super heated steam at 4 MPa and 400°C. A coal which has an ultimate analysis (by mass) as 61.40 percent C,

5.79 percent H2, 25.31 percentO2, 1.09 percent N2, 1.41 percent S (sulfur), and 5.00 percent ash (non-combustibles) is burned at atmospheric pressure with 50 percent excess air. The coal and air enter the boiler at25°C and the products of combustion leave at 227°C. Calculate a) the molar fractions of the reactants and the products of this reactions b) the apparent molar mass of the coal c) the heat transfer from the combustion chamber during this process d) the amount of steam generated per unit of fuel mass burned.