Heat engine efficiency for 2700 J work and 8500 J heat input

Thread starter needhelp83
Start date Nov 22, 2006

Join the discussion

Registration is free. Start your own thread to ask a follow-up.

2 replies · 2K views

needhelp83

Thread starter
Nov 22, 2006

A heat engine produces 8500 J of heat while performing 2700 J of useful work. What is the efficiency of this engine?

e=W/Q_h =2700 J/8500 J =0.32 or 32%

This just looked way to easy...hoping to have someone double check

Physics news on Phys.org

Chemists overturn 40-year assumption about a key class of superconductors
Close-up images show defects locking electrons into stable Wigner solids
Disorder is key to tuning a high-temperature superconductor

Discussion

radou

Homework Helper

Nov 22, 2006

Sounds good.

needhelp83

Nov 22, 2006

Wow, what an easy problem. Thanks for the help

Heat engine efficiency for 2700 J work and 8500 J heat input

Discussion

Similar threads

Undergrad Can Heat Engine Efficiency Be Related to Temperature?

Undergrad Carnot Refrigerator Work Input: 230 J Extracts 346 J Heat