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Draw a p-V diagram showing negative work with varying pressure. - Physics

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प्रश्न

Draw a p-V diagram showing negative work with varying pressure. 

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उत्तर

p-V diagram showing negative work with varying pressure:

 

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अध्याय 4: Thermodynamics - Short Answer I

संबंधित प्रश्न

Give an example of some familiar process in which heat is added to an object, without changing its temperature.


Draw a p-V diagram of the reversible process. 


Draw a p-V diagram showing positive work at constant 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 𝛾 = 1.4) 


Explain work done during a thermodynamic 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)


In an isochoric process, we have ____________.


Apply first law for an isothermal process.


Apply first law for an adiabatic 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 adiabatic process.


What are the limitations of the first law of thermodynamics?


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)`


Among the amount of heat absorbed and the amount of work done by a system, ______


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 ____________.


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


Assertion: Equal volumes of monatomic and polyatomic gases are adiabatically compressed separately to equal compression ratio `("P"_2/"P"_1)`. Then monatomic gas will have greater final volume.

Reason: Among ideal gases, molecules of a monatomic gas have the smallest number of degrees of freedom.


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?


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?


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")`


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)


In a cyclic process, if ΔU = internal energy, W = work done, Q = Heat supplied then ______.


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