Advertisements
Advertisements
Question
Answer in brief.
Why should a Carnot cycle have two isothermal two adiabatic processes?
Solution
There are basically two processes:
- Exchange of heat (steps A to B and C to D). For this to be reversible, the heat exchange must be isothermal. This is possible if the working substance is at the temperature TH of the source while absorbing heat. The working substance should be at the temperature of the cold reservoir TC while rejecting the heat.
- Work done (steps B to C and D to A). For work done to be reversible, the process should be adiabatic.
Thus, the cycle includes two isothermal and two adiabatic processes for maximum efficiency.
Carnot cycle
APPEARS IN
RELATED QUESTIONS
An ideal gas is taken through an isothermal process. If it does 2000 J of work on its environment, how much heat is added to it?
Heating a gas in a constant volume container is an example of which process?
Draw a p-V diagram of the reversible process.
Draw a p-V diagram of the irreversible process.
Draw a p-V diagram showing negative work with varying pressure.
Draw a p-V diagram showing positive work at constant pressure.
State the assumptions made for thermodynamic processes.
Explain the cyclic process.
Explain work done during a thermodynamic process.
Explain the thermodynamics of the isobaric process.
Explain the thermodynamics of the isochoric process.
Explain thermodynamics of the adiabatic 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
Draw the PV diagram for the isothermal process.
What is meant by a reversible and irreversible processes?
Explain the isobaric process and derive the work done in this 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)
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)`
In which of the following processes, beat is neither absorbed nor released by a system?
For an isothermal expansion of a perfect gas, the value of `(Delta "P")/"P"` is equal to ____________.
An ideal gas is compressed to half its initial volume by means of several processes. Which of the process results in the maximum work done on the gas?
Which of the following processes is reversible?
In the figure shown here, the work done in the process ACBA is ______.
When an inflated ballon is suddenly burst, why is the emerging air slightly cooled?
