For two given isotherms, there are lots of adiabats that cross them' Which two give you the most eff

1
For two given isotherms, there are lots of
adiabats that cross them. Which two give you the
most efficient engine?

• Lowest volume and highest volume
• Two lowest volumes
• Two highest volumes
• All of the above

2
Which increases entropy more?

• Isothermal expansion
• Adiabatic expansion
• Same
• Not enough information

3
What should you add to a PV diagram to determine
the change in entropy between two states (even
for irreversible paths)?

• Isotherms
• Isochors
• Isobars
• adiabats

4
You are mixing red and blue MMs. You have 2
reds and 1 blue. What is the entropy of each
sub-system and the whole?

• Sred 0, Sblue 0, Swhole k ln 3
• Sred 2, Sblue 1, Swhole 3
• Sred 0, Sblue 0, Swhole 0
• None of the above