## anonymous one year ago A heat engine has a cold reservoir of 250°C and a hot reservoir of 715°C. What is the efficiency of the engine

1. anonymous

do you have options

2. anonymous

65.0% 60.8% 73.6% 58.6% 69.1%

3. anonymous

@Hayleymeyer

4. Hayleymeyer

I thought 47%

5. johnweldon1993

Are we to assume a Carnot heat engine?

6. johnweldon1993

If so it would be $\large efficiency = 1 - \frac{T_c}{T_h}$

7. anonymous

sorry i am done with this question i passed the test tho :D

8. johnweldon1993

Great job! This question seemed off anyways...you are supposed to use Kelvin which would lead to the answer @Hayleymeyer gave of 47% however here the answer that they wanted was from using Celsius... Oh well, anyways...Good job! :D lol

9. anonymous

thx for your help everyone :)

10. Hayleymeyer

opssie