A particular engine takes in 10,000 J of heat, does 2,000 J of work, and as it runs discharges heat. Its own energy is the same when it has finished as when it started. How much heat did it discharge if this is a closed system?

2,000 J

8,000 J

10,000 J-my guess

12,000 J

Question

A particular engine takes in 10,000 J of heat, does 2,000 J of work, and as it runs discharges heat. Its own energy is the same when it has finished as when it started. How much heat did it discharge if this is a closed system?

       2,000 J

       8,000 J

       10,000 J-my guess

       12,000 J

anonymous · Answer

i would guess 8000 but i have limited experience with this

anonymous · Answer

becasue say it stats at 0+10000-2000=8000. but it needs to be the same as where it started which was 0 so it needs to lose 8000