Answer
$74\%$
Work Step by Step
The maximum efficiency (Carnot efficiency) is given by equation 15–5. Make sure to measure temperatures in kelvins.
$$e_{ideal}=1-\frac{T_L}{T_H}=1-\frac{77K}{293K}=0.7372=74\%$$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.