What Is the Carnot Efficiency Formula for Engine Calculations?

AI Thread Summary
The discussion centers on calculating the calories rejected by a Carnot engine operating between two heat reservoirs at 500K and 300K. The engine receives 200 calories from the hot reservoir and the user is trying to determine how many calories are rejected to the cold reservoir. They propose using a proportional equation based on the temperatures of the reservoirs, suggesting that the calculation yields 120 calories. The thermal efficiency formula for a Carnot engine is highlighted as 1 - T_c/T_h, which is relevant for determining efficiency. The conversation emphasizes the need for clarity on the application of this formula in practical engine calculations.
brilyn
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Is there a formula used to solve engine problems? For example a carnot engine is operated between two heat reservoirs at temperatures of 500K and 300K. If the engine receives 200 cal from the reservoir at 500K in each cycle. How many calories does it reject to the reservior at 300K?
This seems like it should be very easy but it's something we never went over in class. I know is receives more from the hot than it rejects so would I set up a proportional equation and take 200/500 then multiply by 300? this gives me 120cal... Let me know if I'm on the right track or if there is a formula to use Thanx
 
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I'm not sure if this will help but the thermal efficiency of a Carnot engine is 1- T_c/T_h
 
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