I have a test tomorow and this question is gonna be on there:
"A refrigerator transfers heat q from a cold system at a constant temperature Tsys, to hot surroundings at a constant temperature Tsurr which is assumed to be reversible. What is the minimum total amount of heat that surroundings should obtain in such a process to satisfy the 2nd law of thermodynamics"
The answer I got was -q/Tsys + Q/Tsurr > 0
which means Q= q (Tsur/Tsys)
I was wondering if this is right if not can you guys help me out? Some of my classmates got q + Q= q ( 1+ TSur (1/Tsur-1/Tsur))
If you get similiar to the second equation please let me know because this is urgent my test is tomorow