Instructions: Answer the following problems completely, using complete sentences when necessary, and box your final answer. 1. What is the equation for the efficiency of a heat engine? 2. Find the efficiency of a gasoline engine that, during onc cycle, receives 322 J of energy from . W combustion and loses 149 J as heat to the exhaust. M 3. What is entropy? Give an example. 4. An engineer claims to have built an engine that takes 7.5x10 4J and expels 3.5x104J. a. How much energy can the engine prowde by domg work? b. What is the efficiency of the engine? C. Is this efficiency possible? Explain your