Question: One of the most efficient heat engines ever built

One of the most efficient heat engines ever built is a steam turbine in the Ohio valley, operating between 430°C and 1 870°C on energy from West Virginia coal to produce electricity for the Midwest.
(a) What is its maximum theoretical efficiency?
(b) The actual efficiency of the engine is 42.0%. How much useful power does the engine deliver if it takes in 1.40 X 105 J of energy each second from its hot reservoir?
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  • CreatedOctober 25, 2009
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