Home
Class 11
CHEMISTRY
A piston cylinder device initially conta...

A piston cylinder device initially contains `0.2m^(3)` neon (assume ideal ) at 200kPa inside at `T_(1) ""^(@)C`. A valve is now opened and neon is allowed to escape until the volume reduces to half the initial volume. At the same time heat transfer with outside at `T_(2) ""^(@)C` ensures a constant temperature inside. Select correct statement(s) for given process

A

`Delta U` must be zero

B

`Delta U` can not be zero

C

q may be +ve

D

q may be -ve

Text Solution

Verified by Experts

The correct Answer is:
B, C
Mass transfer `rArr Delta U ne 0`, P const, `V darr`
To maintain constant `T, q gt 0`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • CHEMICAL THERMODYNAMICS

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE EXERCISE (PRACTICS SHEET (ADVANCED) LINKED COMPREHENSION TYPE QUESTIONS)|5 Videos

  • CHEMICAL THERMODYNAMICS

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE EXERCISE (PRACTICS SHEET (ADVANCED) MATRIX MATCHING TYPE QUESTIONS)|1 Videos

  • CHEMICAL THERMODYNAMICS

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE EXERCISE (PRACTICS SHEET (ADVANCED) STRAIGHT OBJECTIVE TYPE QUESTIONS)|17 Videos

  • CHEMICAL THERMODYANMICS

    AAKASH SERIES|Exercise Questions For Descriptive Answers|28 Videos

  • ELECTRON MIGRATION EFFECTS

    AAKASH SERIES|Exercise QUESTIONS FOR DESCRIPTIVE ANSWERS|10 Videos

Similar Questions

Explore conceptually related problems

0.2m^(3) of an ideal gas at a pressure of 2 MPa and 600 K is expanded isothermally to 5 times the initial volume. It is then cooled to 300 K at constant volume and then compressed back polytropically to its initial state. Determine the net work done and heat transfer during the cycle.

0.2 m^(3) of an ideal gas at a pressure of 2 Mpa and 600 K is expanded isothermally to 5 times the initial volume. It is then cooled to 300 K at constant volume and then compressed back polystro-pically to its initial state. Determine the work done and heat transfer during the cycle.

Knowledge Check

  • Ten moles of a diatomic perfect gas are allowed to expand at constant pressure. The initial volume and temperature V_0 and T_0 respectively. If 7/2 = RT_0 heat is transferred to the gas then the final volume and temperature are

    A
    `1.1V_0, 1.1 T_0`
    B
    `0.9V_0, 0.9 T_0`
    C
    `1.1V_0 . 10/11 T_0`
    D
    `0.9V_0. 10/9 T_0`

  • An ideal gas is found to obey pV^(3/2) = constant during an adiabatic process. If such a gas initially at a temperature T is adiabatically compressed to half of its initial volume, then its final temperature is

    A
    `sqrt2T`
    B
    2T
    C
    `2sqrt2T`
    D
    4T

  • Three moles of an ideal gas (C_p = 7/2 R) at pressure P_A and temperature T_A is isothermally expanded to twice its initial volume. It is then compressed at constant pressure to its original volume. Finally the gas is heated at constant volume to its original pressure P_A . The correct P-V and/or P-T diagrams indicating the process are

    A
    B
    C
    D

    • Similar Questions

    Explore conceptually related problems

    A piston cylinder assembly contains 32g of oxygen at a pressure of 2.0 atmosphere and a temperature of 27^@ C It undergoes a cycle in which it is first heated at constant volume until the pressure becomes three times, then is expanded isothermally to reduce the pressure to the original value. Finally it is cooled, isobarically back to the original temperature. Calculate the work done and change in internal energy in each process. Represent the process on a P-V diagram.

    The figure shows an insulated cylinder of volume V containing monoatomic gas in both the compartments. The piston is diathermic. Initially the piston is kept fixed, and the system is allowed to acquire a state of thermal equilibrium. If the initial pressures and temperatures are as shown. Calculate the final temperature and the final pressure. Now the pin which was keeping the piston fixed is removed and the piston set free to move. The piston is allowed to slide slowly, such that a state of mechanical equilibrium is also achieved (T_1 P_2 gt P_1 T_2 )

    Two containers, each of volume V_(0) , joined by a small pipe initially contain the same gas at pressure P_(0) and at absolute temperature T_(0) . One container is now maintained at the same temperature while the other is heated to 2T_(0) . Find(1) commom pressure of the gas, and(2) the number of moles of gas in the container at temperature 2T_(0)

    Two containers, each of volume VO' joined by a small pipe initially contain the same gas at pressure P_(0) and at absolute temperature T_(0) . One container is now maintained at the same temperature while the other is heated to 2T_(0). Find (1) commom pressure of the gas, and (2) the number of moles of gas in the container at temperature 2T_(0)

    Two containers, each of volume V_0 , joined by a small pipe initially contain the same gas at pressure P_0 and at absolute temperature T_0 . One container is now maintained at the same temperature while the other is heated to 2 T_0 . If the number of moles of gas in the container at temperature 2T_0 is (nP_0 V_0)/( 3 RT_0) then 'n' is

    Home
    Profile