+0  
 
0
64
1
avatar

The temperature of the cold reservoir of an ideal heat engine is 35°C. Its efficiency is 34 percent. What
is the temperature of its reservoir? How much is the input energy if it does 3,250 J of work?

off-topic
 May 5, 2020
 #1
avatar+30044 
+3

Efficiency = 1 - Tcold/Thot  where Thot and Tcold are absolute temperatures. So:

 

0.34 = 1 - (273 + 35)/Thot   Rearrange to find Thot in Kelvin (then subtract 273 if you want the result in Celsius).

 

Efficiency = Work out/Energy_in     Substitute the given values and rearrange to find Energy_in

 May 5, 2020
edited by Alan  May 5, 2020

22 Online Users

avatar
avatar
avatar