1. What would be a meaningful definition for efficiency of a Carnot engine?
(A) Total work divided by total heat.
(B) Total work divided by heat absorbed in step 1.
(C) Work done by the system divided by work done on the system.
(D) Work done by the system divided by work done on the system plus total heat.

2. What would be a meaningful definition for efficiency of a Carnot engine?
(A) Total work divided by total heat.
(B) Total work divided by heat absorbed in step 1.
(C) Work done by the system divided by work done on the system.
(D) Work done by the system divided by work done on the system plus total heat.