In a Carnot engine the temperature of the source and sink are T and T'', respectively. In the first instant the temperature of the source is increased by DeltaT, keeping the sink at T'' and then T'' is decreased by DeltaT keeping the source at T. In which case does the engine have greater efficiency?

In a Carnot engine the temperature of the source and sink are T and T'

1.	In a Carnot engine the temperature of the source and sink are T and T'', respectively. In the first instant the temperature of the source is increased by DeltaT, keeping the sink at T'' and then T'' is decreased by DeltaT keeping the source at T. In which case does the engine have greater efficiency?
Answer» ANSWER :`eta_(2)gtn_(1)`