Question

1. A flask holds 9.73 kg of a monatomic ideal gas (mass number
86.4). If the gas changes temperature isochorically (constant
volume) from temperature 802^{o} C to 376^{o} C,
find the change in the internal energy of the gas, in kJ. A
positive answer means the internal energy increased; a negative
answer means the internal energy decreased.

2. A flask holds 2.25 kg of a diatomic ideal gas (mass number of
the gas 92.1). If the gas changes temperature isochorically
(constant volume) from temperature 356^{o} C to
519^{o} C, find the change in the internal energy of the
gas, in kJ. A positive answer means the internal energy increased;
a negative answer means the internal energy decreased.

Answer #1

A 29.8 liter container holds 4.71 kg of a diatomic ideal gas
(mass number of the gas 508) at 292 oC . If a piston
changes the volume of the gas isothermally to 467 liter, how much
heat added or removed during this process, in kJ? A positive answer
means heat is added; a negative answer means heat was
removed.

A 59.1 liter container holds 8.74 kg of a diatomic ideal gas
(mass number of the gas 973) at 958 degrees Celcius. If a piston
changes the volume of the gas isothermally to 209 liter, how much
heat added or removed during this process, in kJ?
A positive answer means heat is added; a negative answer means
heat was removed.

3 kg of a monatomic ideal gas (mass number 278), is slowly
changed from pressure 36.4 atm and volume 973 liters to pressure
49.6 atm and volume 606 liters. The P-V diagram for this process is
a straight line. Find the total work done by the system, in
KJ. A positive answer means work is done by the system;
a negative answer means work is done on the system.

A certain ideal gas has atomic mass number 806. A flask of
volume 0.0996 m3 holds this gas under pressure 8.36x105 Pa and
temperature 304 K.
How many molecules are in the flask? Give your answer is
scientific notation.

A flask contains 99 moles of a monatomic ideal gas at pressure
6.79 atm and volume 29.3 liters (point A on the graph. Now, the gas
undergoes a cycle of three steps:
- First there is an isothermal expansion to pressure 3.71 atm
(point B on the graph).
- Next, there is an isochoric process in which the pressure is
raised to P1 (point C on the graph).
- Finally, there is an isobaric compression back to the original
state...

A flask contains 90.7 moles of a monatomic ideal gas at pressure
5.64 atm and volume 40.1 liters (point A on the graph. Now, the gas
undergoes a cycle of three steps:
- First there is an isothermal expansion to pressure 3.79 atm
(point B on the graph).
- Next, there is an isochoric process in which the pressure is
raised to P1 (point C on the graph).
- Finally, there is an isobaric compression back to the original
state...

An ideal monatomic gas is contained in a vessel of constant
volume 0.330 m3. The initial temperature and pressure of the gas
are 300 K and 5.00 atm, respectively. The goal of this problem is
to find the temperature and pressure of the gas after 24.0 kJ of
thermal energy is supplied to the gas.
(a) Use the ideal gas law and initial conditions to calculate
the number of moles of gas in the vessel. Your response differs
from the...

Consider a mole of an ideal monatomic gas, Xe, inside a
container with rigid walls. The ideal gas is heated up as a flame
is applied to the container’s exterior. The molar mass of Xe is
0.131 kg. The gas does not transfer any heat to the container.
Answer the following questions.
A.) Before the flame is lit, the pressure of the gas inside the
container is 10.1x10^5 Pa and the temperature of the gas is 295 K.
If at...

Three moles of an ideal monatomic gas expand at a constant
pressure of 2.90atm : the volume of the gas changes from
3.30*10^-2m^3 to 4.50*10^-2m^3.
Part A, Calculate the initial temperature of the gas.
Part B, Calculate the final temperature of the gas.
Part C, Calculate the amount of work the gas does in
expanding.
Part D, Calculate the amount of heat added to the gas.
Part E, Calculate the change in internal energy of the gas.

In this problem, 0.90 mole of a monatomic ideal gas is initially
at 285 K and 1 atm.
(a) What is its initial internal energy?
_____ kJ
(b) Find its final internal energy and the work done by the gas
when 420 J of heat are added at constant pressure.
final internal energy ________kJ
work done by the gas _______kJ
(c) Find the same quantities when 420 J of heat are added at
constant volume.
finale internal energy ________kJ
work...

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