2 kilograms of ideal gas air undergoes an isothermal expansion
from 3MPa and 300K to 1Mpa. Determine the work done, the change in
specific internal energy, and the heat transferred.
Air is at 100 kPa and 150°C, and undergoes a constant
pressure process. The final temperature of the air is 1000°C.
a) Compute the specific volume ratio.
b) Compute the boundary work (kJ/kg)
c) Compute the change in specific internal energy
by:
1. Using the tables.
2. Integrating the polynomial (cp)
3. Assuming constant specific heat.
d) Repeat c for specific enthalpy
e) Compute the heat
An ideal gas undergoes an isothermal expansion from one state
to another. In this process determine the following
(using the sign conventions on page 413):
Q = 0, Q > 0 or Q < 0
W = 0, W > 0 or W < 0
ΔU = 0, ΔU > 0 or ΔU < 0
An ideal gas undergoes an isothermal process. Which
of the following are true (may be more than one): a) No
heat is added or removed from the gas,...
Four kilograms of steam in a piston/cylinder device at 400 kPa and
175 °C undergoes isothermal and mechanically reversible process to
a final pressure such that the steam is completely condensed (i.e.,
became a saturated liquid). Determine Q and W for this process:
(b) Using generalized correlations and Equations (6.70 –
6.74). Comment on the accuracy of your answer.
[Answer: Q = -9,461 kJ, W = 1494.9 kJ]
Nitrogen at 500 KPa, 500K is in a 1m3 insulated tank
connected to a pipe with a value to a second
insulated initially empty tank of 0.5m3. The value is
opened and the nitrogen fills both tanks. Find the
final temperature, pressure and the entropy generation this
process causes.(the gas constant of nitrogen is R=0.2968
KJ/Kg?K)
One
kg de air initially at 300 K and 100 kPa undergoes a
quasi-equilibrium constant-pressure process in a piston-cylinder
assembly. If the final temperature is 450 K, determine the work and
heat interactions and the change in the enthalpy.
For a capacitor of area 100 mm ´100 mm operated at T =
300K, with FM = 5.2 eV, xox = 3 nm,
and
ND = 1017 cm-3
a) Calculate the flat band capacitance and treshold voltage
b) Draw the low frequency and high frequency CV curves
Please solve it completely and step by step. I will rate the
question
A 2.00 mole sample of Ar
undergoes an isothermal reversible expansion from an initial volume
of 2.00 L to a final volume of 85.0
L at 313 K .
a) Calculate the work done in this process
using the ideal gas equation of state.
b) Calculate the work done in this process
using the van der Waals equation of state.
c) What percentage of the work done by the van
der Waals gas arises from the attractive potential?
Thermodynamic
In a piston-cylinder air at 100 kPa and 15°C undergoes the
following cycle. First, it is compressed isentropically to a
compression ratio of 20. Then 1800
kJ/kg of heat is transferred to the air at constant pressure.
Afterwards the air expands isentropically. In the last step, heat
is removed at constant volume until the air reaches its original
state. Assuming air behaves as an ideal gas and with Cp and Cv
independent of temperature, determine the:
(a) pressure and...