Shown below is P-V diagram for a reversible cycle enclosed by 4 reversible process curves.  The curve 1-2 and the curve 3-4 are  reversible isothermal processes, and the curve 2-3 and the curve 1-4 are reversible adiabatic processes. If the cycle direction is counter clockwise, answer the question below. Select curve(s) which represent process(es) having heat interactions?____

Thermodynamics fill in the blank: 1) Among the principal irreversiblilities of a gas turbine power plant, the most significant source of irreversibility by far is ______________. 2) Cooling a gas as it is compressed would reduce the work input required during compression, but achieving a heat transfer rate high enough to effect a significant reduction in work is difficult to achieve in practice. A practical alternative is to introduce multiple stages of compression with heat exchangers called _______________ between the stages.

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.