試題詳解

6. An engine is designed to obtain energy from the temperature gradient of the ocean. What is the thermodynamic efficiency of such an engine if the temperature of the surface of the water is 15 °C and the temperature below the surface is 5 °C?
(A) 96%
(B) 67%
(C) 31%
(D) 17%
(E) 3.5%