English

Explain graphically (i) positive work with varying pressure, (ii) negative work with varying pressure, and (iii) positive work at constant pressure.

Advertisements
Advertisements

Question

Explain graphically (i) positive work with varying pressure, (ii) negative work with varying pressure, and (iii) positive work at constant pressure. 

Graph
Advertisements

Solution

  1. p-V diagram showing positive work with varying pressure:

  2. p-V diagram showing negative work with varying pressure:

  3. p-V diagram showing positive work at constant pressure:

shaalaa.com
  Is there an error in this question or solution?
Chapter 4: Thermodynamics - Short Answer II

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?


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


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


Draw a p-V diagram of the irreversible process. 


Draw a p-V diagram showing positive work at constant pressure. 


Differentiate between the reversible and irreversible processes.


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 work done during a thermodynamic process.


In an isochoric process, we have ____________.


Give an expression for work done in an isothermal process.


Apply first law for an adiabatic process.


Draw the PV diagram for the isothermal process.


Draw the PV diagram for the isobaric process.


Draw the PV diagram for the isochoric process.


What is a cyclic process?


What is meant by a reversible and irreversible processes?


Can the given heat energy be completely converted to work in a cyclic process? If not, when can the heat can completely converted to work?


Explain in detail the isothermal process.


Draw the TP diagram (P-x axis, T-y axis), VT(T-x axis, V-y axis) diagram for

  1. Isochoric process
  2. Isothermal process
  3. Isobaric process

An ideal gas is taken in a cyclic process as shown in the figure. Calculate

  1. work done by the gas
  2. work done on the gas
  3. Net work done in the process


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, ______


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?


In a certain thermodynamical process, the pressure of a gas depends on its volume as kV3. The work done when the temperature changes from 100°C to 300°C will be ______ nR, where n denotes number of moles of a gas.


Explain the thermodynamic process.


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


Share
Notifications

Englishрд╣рд┐рдВрджреАрдорд░рд╛рдареА


      Forgot password?
Use app×