Home
Class 11
PHYSICS
Two moles of helium gas undergo a cyclic...

Two moles of helium gas undergo a cyclic process as shown in Fig. Assuming the gas to be ideal, calculate the following quantities in this process

(a) The net change in the heat energy
(b) The net work done
(c) The net change in internal energy

Text Solution

Verified by Experts

The correct Answer is:
A, B, C

In a cyclic process,
`DeltaU=0`
`Q_(n et)=W_(n et)`
`Q_(AB)=nC_pDeltaT`
`=(2)(5/2R)(400-300)`
`=500R`
`Q_(BC)=nRT_(B)In(p_i/p_f)`
`=(2)(R)(400)In(2/1)`
`=800RIn(2)`
`Q_(CD)=nC_pDeltaT`
`=-500R`
`Q_(DA)=nRT_DIn(p_i/p_f)`
`=(2)(R)(300)In(1/2)`
`=-600RIn(2)`
`:.` `Q_(n et)=W_(n et)=(200R)In(2)`
`=(200)(8.31)(0.693)`
`~~1153J`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • LAWS OF THERMODYNAMICS

    DC PANDEY|Exercise Level 2 Passage II|3 Videos
  • LAWS OF MOTION

    DC PANDEY|Exercise Medical entrances gallery|39 Videos
  • MAGNETIC EFFECT OF CURRENT AND MAGNETISM

    DC PANDEY|Exercise Integer type Questions|10 Videos

Similar Questions

Explore conceptually related problems

One mole of Helium gas undergoes a reversible cyclic process ABCDA as shown in the figure.Assuming gas to be ideal, answer the following questions : What is the net work involved in the process A to C :

One mole of Helium gas undergoes a reversible cyclic process ABCDA as shown in the figure.Assuming gas to be ideal, answer the following questions : What is the value of 'q' for the overall cyclic process:

Knowledge Check

  • Two moles of helium gas undergo a cyclic process as shown in figure. Assuming the gas to be ideal. The net work done by the gas is

    A
    200 Rln2
    B
    100 Rln2
    C
    300 Rln2
    D
    400 Rln2
  • Two moles of helium gas undergo a cyclic process as shown in figure. Assuming gas to be ideal, the net heat exchange in the process will be

    A
    1000 J
    B
    1152 J
    C
    1200 J
    D
    1500 J
  • Two moles of Helium gas undergo a reversible cyclic process as shown in figure. Assuming gas to be ideal, what is the net work involved in the cyclic process ?

    A
    `-100 R ln 4`
    B
    `+100 R ln 4`
    C
    `+200 R ln 4`
    D
    `-200 R ln 4`
  • Similar Questions

    Explore conceptually related problems

    One mole of Helium gas undergoes a reversible cyclic process ABCDA as shown in the figure.Assuming gas to be ideal, answer the following questions : What is the value of DeltaH for the overall cyclic process:

    Two moles of an ideal monoatomic gas undergoes a cyclic process ABCA as shown in V-T diagram below: Heat supplied to the gas during the process AB is :

    Two moles of helium gas are taken over the cycle ABCDA , as shown in the P-Tdigram Assuming the gas to be ideal the work done on the gas in taking if from A to B is -

    In a cyclic process, the internal energy of the gas

    In a cyclic process, the internal energy of the gas