Consider three Carnot engines with operating characteristics as follows: Source temperature Sink temperature Efficiency Carnot engine a Carnot engine b Carnot engine c T1 T3 ea T1 T2 eb T2 T3 ec Show that (1-e.) %3D (1-е») (1-е.).

A 2.00 mol sample of an ideal diatomic gas is taken through a reversible cycle A → B → C → A as shown in the figure below. Process A → B is isothermal expansion. For the cycle, calculate: a) the work done by the gas, b) the heat energy added to the gas, c) the heat energy exhausted by the gas, d) the thermal efficiency, e) the change in entropy of the gas. f) Determine the efficiency of a Carnot engine operating between the same temperature extremes,           R = 8.314 J/mol K      Data at vertices for the above PV diagram are as follow: PA = 5.00 x 105 Pa, VA = 1.00 x 10 -2 m3,     PB = 1.25 x 105 Pa, VB = 4.00 x 10 -2 m3                   PC = 1.25 x 105 Pa, VC = 1.00 x 10 -2 m3

Explain the heat transferred from a furnace (Q) to convert the boiler feed water at 25 ° C into superheated steam at 17 bar and 250 ° C.

An engine has the Lenoir thermodynamic cycle as shown in the figure. Given:    1 mol of ideal gas  CP,m = 3.5 R  P1 = 2 atm ; P2 = 5 atm  V1 = 3000 cm3 ; V3 = 6000 cm3 Find the following: Temperature at (P1, V1), (P2, V2), and (P2, V1) QH and Qc (Note; QH comes from Process 1->2; Proces 2-3 is considered isentropic efficiency of the engine