Advertisements
Advertisements
Question
Differentiate between the reversible and irreversible processes.
Advertisements
Solution
| 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:
|
RELATED QUESTIONS
For work done to be reversible, the process should be ______
Draw a p-V diagram of the reversible process.
Draw a p-V diagram showing negative work with varying pressure.
An ideal gas of volume 2 L is adiabatically compressed to (1/10)th of its initial volume. Its initial pressure is 1.01 x 105 Pa, calculate the final pressure. (Given ЁЭЫ╛ = 1.4)
Explain the thermodynamics of the isochoric process.
When food is cooked in a vessel by keeping the lid closed, after some time the steam pushes the lid outward. By considering the steam as a thermodynamic system, then in the cooking process
The V-T diagram of an ideal gas which goes through a reversible cycle A→B→C→D is shown below. (Processes D→A and B→C are adiabatic)

The corresponding PV diagram for the process is (all figures are schematic)
In an isochoric process, we have ____________.
Apply first law for an isothermal process.
Give an equation state for an isochoric process.
Draw the PV diagram for the adiabatic process.
What is a cyclic process?
What is meant by a reversible and irreversible processes?
Explain in detail the isothermal process.
Derive the work done in an isothermal process.
In an adiabatic expansion of the air, the volume is increased by 4%, what is the percentage change in pressure? (For air γ = 1.4)
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)
An ideal gas is taken in a cyclic process as shown in the figure. Calculate
- work done by the gas
- work done on the gas
- Net work done in the process

For a given ideal gas 6 × 105 J heat energy is supplied and the volume of gas is increased from 4 m3 to 6 m3 at atmospheric pressure. Calculate
- the work done by the gas
- change in internal energy of the gas
- graph this process in PV and TV diagram
An ideal gas is made to go from a state A to stale B in the given two different ways (see figure) (i) an isobaric and then an isochoric process and (ii) an isochoric and then an isobaric process. The work done by gas in the two processes are W1 and W2 respectively. Then,

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?
Which of the following processes is reversible?
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) |
Give any two types of a thermodynamic process.
An ideal gas is taken through a cyclic process ABCDA as shown in figure. The net work done by the gas during the cycle is ______.







