A scientific study carried out on a natural gas combined cycle power station showed that the efficiency of the generators decreased as the ambient temperature increased from 8∘C to 23∘C .
(1) Outline why this result was to be expected.
(2) Calculate the maximum theoretical efficiency of such a power station operating between the temperatures 700∘C and
- 8∘C .
- 23∘C .
(3) At the ambient temperature of 8∘C , the electrical energy produced by each generator was 46.0 MW . When the ambient temperature was increased to 23∘C , the electrical energy produced by each generator fell to 40.0 MW . How does the change in electrical energy production compare with the change in the maximum theoretical efficiency of the generators? Comment on your answer.