Problem 1 Indicate whether the following statements are true or false. Explain. a) The maximum thermal efficiency of any heat engine operating between hot and cold thermal energy reservoirs at 1000 C and 500 C, respectively, is 50 %. b) A process of a closed system that violates the second law of thermodynamics necessarily violates the first law of thermodynamics. c) Friction associated with flow of fluids through pipes and around objects is one type of irreversibility