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2 pts) 12. If air passes through an adiabatic nozzle operating at steady state, neglecting changes in potential energy, the gas temperature will a) remain constant b) decrease c) increase d) not enough information is given (2 pts) 13. An adiabatic, internally reversible process is also: a) an isothermal process b) an isentropic process c) a polytropic process d) an isobaric process (2 pts) 14. A stationary closed system containing an ideal gas undergoes an isothermal, adiabatic process. The amount of work done during this process is zero. True or False? (Circle answer.) (3 pts) 15. Consider an adiabatic turbine operating on air, where the inlet pressure is 1.5 MPa and 500 K and the outlet pressure is 0.1 MPa. On a T-s diagram, (a) draw the two isobars and label State 1, (b) draw the process corresponding to an internally reversible turbine and label the outlet condition as 2b. (c) draw the process for an actual turbine and label the outlet condition as 2c. Note that the initial state is the same for both processes. T S (4 pts) 16. One kilogram of a two-phase, saturated liquid-vapor mixture of H\(_2\)O, initially at P\(_i\) and T\(_i\), is stirred in a rigid, well-insulated tank until only saturated vapor remains. (a) On the P-V diagram below sketch the vapor dome and the T\(_i\) isotherm in the compressed liquid, saturated mixture, and superheated vapor regions. (b) Sketch this process on the P-V diagram below and label the final state as 2. P V

          2 pts) 12. If air passes through an adiabatic nozzle operating at steady state, neglecting changes in potential energy, the
gas temperature will
a) remain constant
b) decrease
c) increase
d) not enough information is given
(2 pts) 13. An adiabatic, internally reversible process is also:
a) an isothermal process
b) an isentropic process
c) a polytropic process
d) an isobaric process
(2 pts) 14. A stationary closed system containing an ideal gas undergoes an isothermal, adiabatic process.
The amount of work done during this process is zero. True or False? (Circle answer.)
(3 pts) 15. Consider an adiabatic turbine operating on air, where the inlet pressure is 1.5 MPa and 500 K and the outlet
pressure is 0.1 MPa. On a T-s diagram,
(a) draw the two isobars and label State 1,
(b) draw the process corresponding to an internally reversible turbine and label the outlet condition as 2b.
(c) draw the process for an actual turbine and label the outlet condition as 2c.
Note that the initial state is the same for both processes.
T
S
(4 pts) 16. One kilogram of a two-phase, saturated liquid-vapor mixture of H\(_2\)O, initially at P\(_i\) and T\(_i\), is stirred in a
rigid, well-insulated tank until only saturated vapor remains.
(a) On the P-V diagram below sketch the vapor dome and the T\(_i\) isotherm in the compressed liquid,
saturated mixture, and superheated vapor regions.
(b) Sketch this process on the P-V diagram below and label the final state as 2.
P
V

2 pts) 12. If air passes through an adiabatic nozzle operating at steady state, neglecting changes in potential energy, the
gas temperature will
a) remain constant
b) decrease
c) increase
d) not enough information is given
(2 pts) 13. An adiabatic, internally reversible process is also:
a) an isothermal process
b) an isentropic process
c) a polytropic process
d) an isobaric process
(2 pts) 14. A stationary closed system containing an ideal gas undergoes an isothermal, adiabatic process.
The amount of work done during this process is zero. True or False? (Circle answer.)
(3 pts) 15. Consider an adiabatic turbine operating on air, where the inlet pressure is 1.5 MPa and 500 K and the outlet
pressure is 0.1 MPa. On a T-s diagram,
(a) draw the two isobars and label State 1,
(b) draw the process corresponding to an internally reversible turbine and label the outlet condition as 2b.
(c) draw the process for an actual turbine and label the outlet condition as 2c.
Note that the initial state is the same for both processes.
T
S
(4 pts) 16. One kilogram of a two-phase, saturated liquid-vapor mixture of H2O, initially at Pi and Ti, is stirred in a
rigid, well-insulated tank until only saturated vapor remains.
(a) On the P-V diagram below sketch the vapor dome and the Ti isotherm in the compressed liquid,
saturated mixture, and superheated vapor regions.
(b) Sketch this process on the P-V diagram below and label the final state as 2.
P
V

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