At a steam power plant, steam engines work in pairs, the heatoutput of the first one being the approximate heat input of thesecond. The operating temperatures of the first are 770 ∘C and 460∘C, and of the second 435 ∘C and 280 ∘C.
A) If the heat of combustion of coal is 2.8×107J/kg, at whatrate must coal be burned if the plant is to put out 860 MW ofpower? Assume the efficiency of the engines is 65% of the ideal(Carnot) efficiency
B)Water is used to cool the power plant. If the watertemperature is allowed to increase by no more than 4.5∘C, estimatehow much water must pass through the plant per hour.
