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
Vilka [71]
3 years ago
11

Derivation 1.2 showed how to calculate the work of reversible, isothermal expansion of a perfect gas. Suppose that the expansion

is reversible but not isothermal and that the temperature decreases as the expansion proceeds. (a) Find an expression
Physics
1 answer:
stellarik [79]3 years ago
6 0

Answer:

(a) The work done by the gas on the surroundings is, 17537.016 J

(b) The entropy change of the gas is, 73.0709 J/K

(c) The entropy change of the gas is equal to zero.

Explanation:

(a) The expression used for work done in reversible isothermal expansion will be,

where,

w = work done = ?

n = number of moles of gas  = 4 mole

R = gas constant = 8.314 J/mole K

T = temperature of gas  = 240 K

= initial volume of gas  =  

= final volume of gas  =  

Now put all the given values in the above formula, we get:

The work done by the gas on the surroundings is, 17537.016 J

(b) Now we have to calculate the entropy change of the gas.

As per first law of thermodynamic,

where,

= internal energy

q = heat

w = work done

As we know that, the term internal energy is the depend on the temperature and the process is isothermal that means at constant temperature.

So, at constant temperature the internal energy is equal to zero.

Thus, w = q = 17537.016 J

Formula used for entropy change:

The entropy change of the gas is, 73.0709 J/K

(c) Now we have to calculate the entropy change of the gas when the expansion is reversible and adiabatic instead of isothermal.

As we know that, in adiabatic process there is no heat exchange between the system and surroundings. That means, q = constant = 0

So, from this we conclude that the entropy change of the gas must also be equal to zero.

Explanation:

You might be interested in
A substance is soluble in water. It is added into the water and dissolves. More solute continues being added until it reaches a
Sophie [7]

Answer:

option D

Explanation:

also to add.... there exists a solubility equilibrium between solid solute and the solution.

4 0
3 years ago
WILL MARK BRAINLIEST!<br> WORTH A LOT OF POINTS!
Shalnov [3]

Answer:

A is your anwser

Explanation:

4 0
3 years ago
Read 2 more answers
A graph titled Distance as a Function of Time with horizontal axis time (seconds) and vertical axis distance (meters). A straigh
yanalaym [24]

Answer:

3 m

Explanation:

6 0
2 years ago
Read 2 more answers
A 250 kg flatcar 25 m long is moving with a speed of 3.0 m/s along horizontal frictionless rails. A 61 kg worker starts walking
Anna11 [10]

Answer:

x=31.09m

Explanation:

p1=p2

The momentum of flatcar and the momentum of the worker so

The velocity of the worker is:

m_{f}*v_{f}=m_{w}*v_{w}\\\\v_{f}=\frac{m_{f}*v_{f}}{m_{w}}\\v_{f}=\frac{61kg*3.0\frac{m}{s}}{250kg}\\v_{f}=0.732\frac{m}{s}

The total motion has a total velocity and is

Vt=v_{w}+v_{f}\\Vt=0.732\frac{m}{s}+3.0\frac{m}{s}\\Vt=3.732\frac{m}{s}

The time the worker take walking is

t=\frac{x}{v_{w}}\\t=\frac{25m}{3\frac{m}{s}}=8.33s

Now the total time and the total velocity determinate the motion of tha flatcar how far has moved

x=t*Vt\\x=8.33s*3.732\frac{m}{s} \\x=31.09m

5 0
3 years ago
Technician A says that the pushrods should be rotating while the engine is running if the camshaft and lifters are okay. Technic
Karo-lina-s [1.5K]

Answer:

Technician A

Explanation:

camshafts rotate at one-half the crankshaft speed

6 0
3 years ago
Other questions:
  • A 15kg beam that is 10m long is placed on a fulcrum that is 3m from the end an 80kg person sits at the end closer to the fulcrum
    7·1 answer
  • Unless otherwise posted, what is the speed limit in a school zone? florida
    8·1 answer
  • Why are pots and pans made of metals like steel and their handles made of plastic?
    8·1 answer
  • The medium seismic waves travel through is
    7·2 answers
  • A medicine ball has a mass of 5 kg and is thrown with a speed of 2 m/s. what is its kinetic energy?
    8·1 answer
  • A rigid vessel of 0.06 m3 volume contains an ideal gas , CV =2.5R, at 500K and 1 bar.a). if 15000J heat is transferred to the ga
    14·1 answer
  • If the toy car moved with a velocity of 2m/s to the south for 8s; what is the total displacement of the toy car?
    9·1 answer
  • g f, as a pioneer, you wished to warm your room by taking an object heated on top of a stove into it, which of the following 15
    13·1 answer
  • Why is the fuse used in a circuit called safety fuse?<br>​
    5·2 answers
  • Accurate _______ is needed in a valid experiment.<br><br> Hurry, I need help.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!