Question

A cylinder with a moveable piston holds 1.20 mol of argon at a constant temperature of 295 K. As the gas is compressed isothermally, its pressure increases from 101 kPa to 145 kPa.

(a) Find the final volume of the gas. (answer in:
m^{3})

(b) Find the work done by the gas. (answer in: kJ)

(c) Find the heat added to the gas. (.. kJ)

Answer #1

The volume of 0.850 kg of argon (MW = 40) in a closed
piston-cylinder device is initially 0.500 m3. Now the gas is
expanded at a constant pressure of 165.0 kPa to a volume of 1.30
m3. Note: The IUPAC sign convention for work is used. Work into the
system has a positive value. What is the moving boundary work? kJ
What is the heat interaction? Assume Cp(T)= 21 kJ/kmol·K. kJ

A piston cylinder device contains air with a volume of 0.05 m3
at 25oC and 100 kPa pressure. The gas is now compressed to a final
temperature of 95oC at 250 kPa. This compression is polytropic and
follows PVn=constant.
a. Determine how much boundary work was added to the gas [in
kJ]
b. How much heat was added or removed from this system during
this process? [in kJ]

Suppose 1400 J of heat are added to 1.8 mol of argon gas at a
constant pressure of 120 kPa. (Assume that the argon can be treated
as an ideal monatomic gas.)
(a) Find the change in internal energy. J
(b) Find the change in temperature for this gas. K
(c) Calculate the change in volume of the gas. m3

A cylinder with a piston contains 0.100 mol of nitrogen at
2.00×105 Pa and 320 K . The nitrogen may be treated as
an ideal gas. The gas is first compressed isobarically to half its
original volume. It then expands adiabatically back to its original
volume, and finally it is heated isochorically to its original
pressure.
A) Find the work done by the gas during the initial
compression
B) Find the heat added to the gas during the initial
compression...

A cylinder with a piston contains 0.160 mol of nitrogen at
1.80×105 Pa and 310 K . The nitrogen may be treated as an ideal
gas. The gas is first compressed isobarically to half its original
volume. It then expands adiabatically back to its original volume,
and finally it is heated isochorically to its original
pressure.
a.) Find the work done by the gas during the initial
compression.
b.)Find the heat added to the gas during the initial
compression.
c.)Find...

A volume of 1.50 L of argon gas
is confined in a cylinder with a movable piston under a constant
pressure of 1.22 x 10^5 Pa. when 1.25 kJ of energy in the form of
heat is transferred from the surrounding to the gas, the internal
energy of the gas increases by 1.11 kJ. What is the final volume of
Argon gas in the cylinder?

A piston-cylinder assembly containing 3 kg of an ideal gas
undergoes a constant pressure process from an initial volume of 48
m3 to a final volume of 30 m3 . During the
process, the piston supplies 1.2 MJ of work to the gas. The gas has
a constant specific heat at constant volume of 1.80 kJ/(kg∙K) and a
specific gas constant of 1.48 kJ/(kg∙K). Neglect potential and
kinetic energy changes.
a. Determine the initial specific volume of the gas in...

Suppose 1300 J of heat are added to 4.3 mol of argon gas at a
constant pressure of 120 kPa. (Assume that the argon can be treated
as an ideal monatomic gas.) (a) Find the change in internal energy.
J (b) Find the change in temperature for this gas. K (c) Calculate
the change in volume of the gas.

Oxygen gas is contained in a piston cylinder assembly at an
initial pressure of 1000 kPa and expands from 0.2 m3 to 1.0 m3 by a
process where PV = constant. The gas has an internal energy change
of -200 kJ. Calculate the work (kJ) and the heat transfer (kJ) done
during the process.

An ideal gas is compressed isothermally in a closed and
frictionless piston/cylinder apparatus to 2.5 times its initial
pressure, consuming in the process 2.2 kJ mol−1 of work. Calculate
the temperature of the gas inside the cylinder.

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