1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Feliz [49]
3 years ago
6

A thin partition divides a thermally insulated vessel into a lower compartment of volume V and an upper compartment of volume 2V

. The lower compartment contains n moles of an ideal gas; the upper part is evacuated.When the partition is removed, the gas expands and fills both compartments. How many moles n of gas were initially contained in the lower compartment if the entropy change of the gas in this free-expansion process is 17.28 J/K?
Physics
1 answer:
Anni [7]3 years ago
6 0

Answer:

1.89mol

Explanation:

The entropy change during free expansion is express as

S_{f}-S_{i}=nRln(\frac{V_{F}}{V_{I}})\\

Where S is the entropy of the system,

            n is the amount of mole

             R is the gas constant = 8.314 and

           V is the volume occupied at the initial and final stage

since the process is n adiabatic free expansion, the entropy of the system is constant. Hence we can re-write the equation as

S=nRln(\frac{V_{F}}{V_{I}})\\

where the  V_{i}=v\\ and V_{f}=2v+v=3v\\

S=17.28J/k\\ and

R=8.314\\

Now if we substitute in values we arrive at

17.28=(8.314)n*ln(\frac{3v}{v} )\\17.28=(8.314)n*ln(3 )\\17.28=(8.314)n*1.0986\\n=\frac{17.28}{8.314*1.0989}\\n=1.89 mole\\

You might be interested in
I need help
kupik [55]
I like to just keep writing them over and over on a page also if you remember them just before the exam than as soon as you start write them on the front of your test so you don’t forget them.
Hope this helps.
7 0
3 years ago
Read 2 more answers
I’ll name u BRAINLIEST if u get this right
nekit [7.7K]
V = m1 u1 - m2 u2 / m1
v = 0.01 * 500 - 2 * 1.4 / 0.01
v = 220 m/s
7 0
2 years ago
Please answer for 20 points
Nat2105 [25]
C. Reduce friction between its moving parts
4 0
3 years ago
15 cm
marshall27 [118]

you multiply 15cm by 750 mmhg

6 0
2 years ago
A plate of glass with parallel faces having a refractive index of 1.52 is resting on the surface of water in a tank. A ray of li
inna [77]

Answer:

26.22degrees.

Explanation:

Go through the attachment for a step by step simplified method of how the answer is gotten.

3 0
3 years ago
Other questions:
  • A charge +1.9 μC is placed at the center of the hollow spherical conductor with the inner radius 3.8 cm and outer radius 5.6 cm.
    6·1 answer
  • Emmy is standing on a moving sidewalk that moves at +2 m/s. Suddenly, she realizes she might miss her flight, so begins to speed
    11·1 answer
  • Match one of the numbers with one of the letters. Thanks!!!!!!!!
    6·1 answer
  • Which domain bacteria involved in making sourdough bread belong to
    9·2 answers
  • In an electric shaver, the blade moves back and forth over a distance of 2.0 mm in simple harmonic motion, with frequency 124 Hz
    7·1 answer
  • Find the current passing through each of the 3 resistors connected parallel to each other as shown in the figure (i1, i2, I3). S
    6·1 answer
  • Question 2 of 10<br> Which illustration represents low accuracy and low precision?
    13·1 answer
  • Two spheres A and B are projected off the edge of a 1.0 m high table with the same horizontal velocity . sphere A has a mass of
    11·1 answer
  • A car starts from rest with an acceleration of 8 m/s/s for a time of 4 s. What was the car's final velocity?
    11·1 answer
  • What happens to the iron in the coilgun if the electricity in the coil was turned on
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!