Why Is My Calculation of Carnot Engine Efficiency Incorrect?

AI Thread Summary
The discussion revolves around calculating the efficiency of a Carnot engine operating between temperatures of 230°C and 120°C, with a heat absorption of 6.30*10^4 J. The efficiency formula used is eff = 1 - (Tcold/Thot), but the initial calculation yielded 47.83 percent, which was deemed incorrect. The error was identified as a failure to convert the temperatures from Celsius to Kelvin before applying the formula. Correctly converting the temperatures and recalculating will yield the accurate efficiency of the engine.
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Homework Statement



A Carnot engine operates between 230°C and 120°C, absorbing 6.30*10^4 J per cycle at the higher temperature.

What is the efficiency of the engine?

Homework Equations



eff = 1 - (Tcold/Thot)

The Attempt at a Solution



Using this equation, I get 47.83 percent, which the system is telling me is incorrect. Can anybody offer a solution to this? Thanks.
 
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i was not using kelvin, so i got the answer
 

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