1. What is the maximum efficiency that a heat engine could have when operating between the normal boiling and freezing temperatures of water? (IN %)
2. A proposed ocean thermal-energy conversion (OTEC) system is a heat engine that would operate between warm water (17°C) at the ocean's surface and cooler water (4°C) 1,695 m below the surface. What is the maximum possible efficiency of the system? Enter your answer accurate to two decimal places. (IN %)