Question

I am struggling getting the answer they got, could someone please help?

Gene Synthetic Biology and Occupation Chapter 13, 14 and 15 Homewor* joints connect by collagen fiber /quizzes/78739 A coal-fred power station is a huge heat engine. It uses heat transfer from burning coal to do work to turn turbines, which are used to generate electricity. In one day, a typical power plant generates 2.76x1014 J of heat transfer from coal and 1.87x1014 Jof heat transfer into the environment. What is the efficiency of the power station as a percentage? wered Answer 32.246 margin of error +/-2 In a cyclic process, the work done by an engine is W = QH - QC Where QH is the heat transfer out of the hottest reservoir (the one generating the most energy). Qc is the amount of heat transferred into the colder reservoir The efficiency of a cyclic process is given by: Eff= Multiply the efficiency by 100 to get a percentage. o coa Re

Answer 1

ty As per the given data 1.87810T of heat in going into the environment. This energy will be considerd an loss. Here, OH = 2.76*10 J, Oc= 187*10 J Usefull work will be W = 'OH- Oc W = 2.76810" - 1.878104 W = 0.89 xlol" This is output] - Efficiency is given by Eff= Output xico Input Esf = 0.89x104 x 100 X 100 R. 16810th Eff = 32.246%