At point A in a Carnot cycle, 2.34 mol of a monatomic ideal gas has a pressure of 1 400 kPa, a volume of 10.0 L, and a temperature of 720 K. The gas expands isothermally to point B and then expands adiabatically to point C, where its volume is 24.0 L. An isothermal compression brings it to point D, where its volume is 15.0 L. An adiabatic process returns the gas to point A.

a. Determine all the unknown pressures, volumes, and temperatures as you f ill in the following table:

P V T
A 1400Kpa 10.0L 720K
B
C 24.0L
D 15.0L

b. Find the energy added by heat, the work done by the engine, and the change in internal energy for each of the steps A→ B, B→ C, C→ D, and D → A
c. Calculate the efficiency W net/lQkl.
d. Show that the efficiency is equal to 1 - Tc/TA, the Carnot efficiency.