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महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

Differentiate between the reversible and irreversible processes. - Physics

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प्रश्न

Differentiate between the reversible and irreversible processes.

फरक स्पष्ट करा
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उत्तर

Sr. No. Reversible process Irreversible process
i. A reversible process is a change that can be retraced in a reverse (opposite) direction. An irreversible process is a change that cannot be retraced in a reverse (opposite) direction.
ii. The path of a reversible process is the same in the forward and the reverse direction. The path of an irreversible process is not the same in the forward and the reverse direction.
iii. Reversible changes are very slow and there is no loss of any energy in the process. There is a permanent loss of energy from the system due to friction or other dissipative forces in an irreversible process.
iv. The system comes back to its initial state after it is taken along the reverse path. The change of state depends upon the path taken to change the state during an irreversible process.
v. Reversible processes are ideal processes. Irreversible processes are real processes.
vi.

p-V diagram:

p-V diagram: 

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पाठ 4: Thermodynamics - Short Answer I

संबंधित प्रश्‍न

For work done to be reversible, the process should be ______ 


Heating a gas in a constant volume container is an example of which process?


State the assumptions made for thermodynamic processes.


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Give the equation of state for an isothermal process.


Apply first law for an isothermal process.


Apply first law for an adiabatic process.


Give an equation state for an isochoric process.


In a petrol engine, (internal combustion engine) air at atmospheric pressure and temperature of 20°C is compressed in the cylinder by the piston to `1/8` of its original volume. Calculate the temperature of the compressed air. (For air γ = 1.4)


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  1. the work done by the gas
  2. change in internal energy of the gas
  3. graph this process in PV and TV diagram

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An ideal gas A and a real gas B have their volumes increased from V to 2V under isothermal conditions. The increase in internal energy ____________.


For an isothermal expansion of a perfect gas, the value of `(Delta "P")/"P"` is equal to ____________.


We consider a thermodynamic system. If `Delta"U"` represents the increase in its internal energy and W the work done by the system, which of the following statements is true?


The work done on the system in changing the state of a gas adiabatically from equilibrium state A to equilibrium state B is 22.4 J. If the gas is taken from state A to B through another process in which the net heat absorbed by the system is 15.5 cal, then the net work done by the system in the latter case is ______.

( l cal = 4.2 J)


Consider P-V diagram for an ideal gas shown in figure.


Out of the following diagrams (figure), which represents the T-P diagram?


(i)

(ii)

(iii)

(iv)

Explain the thermodynamic process.


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