Advertisements
Advertisements
Question
In a cyclic process, if ΔU = internal energy, W = work done, Q = Heat supplied then ______.
Options
ΔU = Q
Q = 0
W = 0
W = Q
Advertisements
Solution
In a cyclic process, if ΔU = internal energy, W = work done, Q = Heat supplied then W = Q.
Explanation:
In a cyclic process, the system returns to its initial state at the end of the cycle. Since the internal energy (ΔU) depends only on the state of the system, the change in internal energy over one complete cycle is:
ΔU = 0
From the first law of thermodynamics:
Substituting ΔU = 0
Q = W
Thus, in a cyclic process, the heat supplied to the system (Q) is equal to the work done by the system (W).
APPEARS IN
RELATED QUESTIONS
What is a thermodynamic process?
Draw a p-V diagram showing positive work with varying pressure.
Draw a p-V diagram showing positive work at constant pressure.
Explain the thermodynamics of the isobaric process.
When a cycle tyre suddenly bursts, the air inside the tyre expands. This process is ____________.
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
When you exercise in the morning, by considering your body as a thermodynamic system, which of the following is true?
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)
Give the equation of state for an adiabatic process.
Draw the PV diagram for the adiabatic process.
Draw the PV diagram for the isobaric process.
Draw the PV diagram for the isochoric process.
What is meant by a reversible and irreversible processes?
Derive the work done in an isothermal process.
Explain in detail the isochoric process.
What are the limitations of the first law of thermodynamics?
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
A thermodynamic system undergoes cyclic process ABCDA as shown in the figure. The work done by the system is ______
A monoatomic gas of pressure p having volume V expands isothermally to a volume 2V and then adiabatically to a volume 16V. The final pressure of the gas is ____________.
`("ratio of specific heats" = 5/3)`
One mole of an ideal gas with `gamma` = 1.4 is adiabatically compressed so that its temperature rises from 27° C to 47° C. The change in the internal energy of the gas is (R = 8.3 J/mol.K) ____________.
Two identical samples of a gas are allowed to expand (i) isothermally (ii) adiabatically. Work done is ____________.
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 ____________.
Ideal gas for which 'ϒ' = 1.5 is suddenly compressed to `1/4`th of its initial volume. The ratio of 4 the final pressure to the initial pressure is ______.
`(ϒ = "C"_"p"/"C"_"v")`
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) |
When an inflated ballon is suddenly burst, why is the emerging air slightly cooled?
