Power plants of the type described here operate with an efficiency of about 39%; that is, for each unit of heat released with the combustion of coal, 0.39 unit is converted to electrical energy. From this efficiency and the specified power output of 500 MWe, determine the following:

a. The coal feed rate (kg/h).

b. The air feed rate (kmol/min, standard cubic meters/min, cubic meters/min).

c. The flow rate of each component in the gas leaving the furnace (kmol/min, kg/min).

d. The rate of steam generation (kg/h).