9. A Carnot engine consisting of 1.00 mol of a perfect monoatomic gas operates between Th = 250 C and Tc = 00 C. This gas has an initial volume of 24.8 L at 1.00 bar, and when the Carnot cycle is completed, this gas returns to this same initial state. (24 pts) The four steps in the Carnot cycle are: Step 1: An isothermal reversible expansion in which the volume changes to 50.0 L; Step 2: A reversible adiabatic expansion in which the temperature changes to Tc. Step 3: A reversible isothermal compression in which the volume changes to 24.8 L. Step 4: A reversible adiabatic compression back to the initial state. (a) If this heat engine was redesigned so that the perfect monoatomic gas expands isothermally to 50.0 L and adiabatically to -25 0C instead of 0 0C. By what factor has the work output from this engine increased? What are the values of qh and qc for this redesigned engine? (b) What are the efficiencies of the original engine and the redesigned engine?
9. A Carnot engine consisting of 1.00 mol of a perfect monoatomic gas operates between Th = 25C and T = 0 C. This gas has an initial volume of 24.8 L at 1.00 bar, and when the Carnot cycle is completed, this gas returns to this same initial state. (24 pts) The four steps in the Carnot cycle are: Step 1: An isothermal reversible expansion in which the volume changes to 50.0 L: Step 2: A reversible adiabatic expansion in which the temperature changes to Tc. Step 3: A reversible isothermal compression in which the volume changes to 24.8 L Step 4: A reversible adiabatic compression back to the initial state (a) If this heat engine was redesigned so that the perfect monoatomic gas expands isothermally to 50.0 L and adiabatically to -25C instead of 0 C. By what factor has the work output from this engine increased? What are the values of gh and qc for this redesigned engine? (b) What are the efficiencies of the original engine and the redesigned engine?