How do you find the specific volume of R-134A at P=700 kPa and
T= 120 C?...
How do you find the specific volume of R-134A at P=700 kPa and
T= 120 C? I know it is from the tables but I can't seem to figure
out how to get the number: v = 0.43358 m^3/kg
100 kg of R-134a at 320 kPa are contained in a piston-cylinder
device whose volume is 7.530 m3. The piston is now moved
until the volume is one-half its original size. This is done such
that the pressure of the R-134a does not change. Determine the
final temperature and the change in the total internal energy of
the R-134a. (Round the final answers to two decimal places.)
100 kg of R-134a at 200 kPa are contained in a piston–cylinder
device whose volume is 12.766 m3. The piston is now
moved until the volume is one-half its original size. This is done
such that the pressure of the R-134a does not change. Determine the
final temperature and the change in the total internal energy of
R-134a. Use data from the steam tables.
The final temperature is °C.
The total change in internal energy is kJ/kg.
Thermodynamics - water
P = 20 bar, T = 250 C, what is the specific volume? (choose the
closest answer)
a)0.1085
b)0.15
c)0.1200
d)0.1308
T = 240 C, P = 2.5 bar, what is the specific internal
energy?.
a)2713.1
b)2714
c)2717.2
d)2720
P = 20 bar, h = 2900 kJ/kg, what is the temperature?
a)250
b)240
c)280
d)300
A compressor receives 0.1 kg/s R-134a at 150 kPa, -10 degrees C
and delivers it at 1000 kPa, 40oC. The power input is measured to
be 3 kW. The compressor has heat transfer to air at 100 kPa coming
in at 20 degrees C and leaving at 25 degrees C.
I'm trying to find the mass flow rate of air, BUT can you please
just show me the energy balance and Schematic to set this up.
JUST the energy balance...
Determine the thermodynamic state of 1,1,1,2-Tetrafluoroethane
(R-134a) at 102 °C and 1000 kPa. Critical Pressure= 4.059 MPa,
Critical Temperature = 101.06°C.
*I keep getting stuck with a quadratic equation and two volume
values, when using the van der Waals equation of state
(P=(RT/(V-b))-(a/V^2))....I am determining the thermodynamic state
by finding if the compressibility factor (z) is less than or
greater than 1, to find if attractive or repulsive forces
dominate.
A system contains H2O at P=150 kPa, v= 1.5 m^3 and a specific
volume of 0.5 m^3/kg (state 1). It is heated at constant volume
until the temperature reacues 160 celcius
What is the temperature at state 1 ?
At the inlet of a steam turbine the following information are
given: p=1000 kPa, T=500 deg-C, u = 3124.3 kJ/kg, v = 0.35411, V=20
m/s, z=10 m, and mdot=10 kg/s.
determine the inlet area.
Determine the flow work at the inlet in MW
Determine the rate of transport of flow energy (Jdot).
If you neglect ke and pe in the expression for j, how would the
answer in part c change? in percentage
For H2O, determine the specific volume at the indicated state,
in m3/kg. (a) T = 400°C, p = 20 MPa. (b) T = 120°C, p = 20 MPa. (c)
T = 40°C, p = 2 MPa.
I have figured out how to do A, but can't get the correct answer
for B or C. All the examples I am finding are with numbers that are
listed already on the charts, and mine are not so I need to
approach the...
For H2O, determine the specific volume at the indicated state,
in m3/kg.
(a) T = 480°C, p = 20 MPa.
(b) T = 160°C, p = 20 MPa.
(c) T = 40°C, p = 2 MPa.