Problem 1 Answer each question concisely. (10 marks) (1) Draw the Pu and T-s diagrams for the Carnot cycle. (2) What is the physical meaning of entropy? (3) Determine whether each statement is true or false. Explain the reason concisely. a) An inventor has developed a cyclic device that receives heat from a reservoir at 327C and discharges heat to another reservoir at 27C. A thermal efciency of 60% is claimed for the cycle. b) Heat is always transferred from a high-temperature body to a low-temperature one in nature. The reverse process cannot occur unless consuming external work