ENGR 207 ELEMENTARY THERMODYNAMICS
Summer 2010
Q1
If the barometric pressure (atmospheric) is 1000 mbars (100 kPa), convert:
[A]
a gage reading of 2.00 bars to an absolute pressure in kPa.
[B]
an absolute pressure of 0.50 bars to millibars vacuum.
[C]
a v
ENGR 207 ELEMENTARY THERMODYNAMICS
Summer 2010
Q4
During a constant-pressure process, Refrigerant 134a is condensed in a closed system
from an initial state of 0.6 MPa and 60 C to a final state of saturated liquid.
Sketch the process on P v and T v diagra
ENGR 207 ELEMENTARY THERMODYNAMICS
Summer 2010
Q 4C
During a constant-pressure process, steam is condensed in a closed system from an
initial state of 0.6 MPa and 600 C to a final state of saturated liquid.
Sketch the process on P v and T v diagrams.
Dete
ENGR 207 ELEMENTARY THERMODYNAMICS
Summer 2010
Q2
A 0.5-m3 rigid tank contains saturated mixture of refrigerant-134a at 200 kPa. If the saturated
liquid occupies 10% of the volume, determine the quality and the total mass of the refrigerant in
the tank.
S