Home
Class 12
CHEMISTRY
A certain amount of gas is expanded from...

A certain amount of gas is expanded from a volume of 20 mL to 42.6 mL by the following three processes (i) against zero pressure (ii) against constant external pressure of 1.2 atm (iii) against constant external pressure of 2.0 atm. Calculate the work done in each of the above three processes.

Text Solution

Verified by Experts

(i) w=0
(ii) `w= - P_(ex)(V_(2)-V_(1))= - 1.2 " atm " (42.6 -20)` mL
`=- 2.74 J`
`(iii) w= - P_(ex)(V_(2)-V_(1))= -2` atm (42.6-20) mL = -4.57 J
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • CHEMICAL THERMODYNAMICS

    CHHAYA PUBLICATION|Exercise Practice Set 6|15 Videos

  • CHEMICAL THERMODYNAMICS

    CHHAYA PUBLICATION|Exercise LONG TYPE QUESTIONS|37 Videos

  • CHEMICAL KINETICS

    CHHAYA PUBLICATION|Exercise EXERCISE (NUMERICAL PROBLEMS)|37 Videos

  • CHEMISTRY IN EVERYDAY LIFE

    CHHAYA PUBLICATION|Exercise PRACTICE SET 15|15 Videos

Similar Questions

Explore conceptually related problems

Two litre of N_2 at 0^@C and 5 atm pressure are expanded isothermally against a constant external pressure of 1 atm until the pressure of gas reaches 1 atm. Assuming gas to be ideai, calculate work of expansion.

A gas is compressed by an external pressure of 5 atm. The work done in the process is 1034 J. How much volume of the gas is reduced?

Knowledge Check

  • A gas expands from a volume of 1 m^3 to a volume of 2 m^3 against an external pressure of 10^5 Nm^-2 . the work done by the gas will be

    A
    `10^4J`
    B
    `10^2J`
    C
    `10^3J`
    D
    `10^5J`

  • A gas can expand from 100 mL to 250 mL. under a constant pressure of 2 atm. The work done by the gas is

    A
    30.38 J
    B
    25 J
    C
    5 kJ
    D
    16 J

  • A gas is allowed to expand in a well insulated container against a constant external pressure of 2.5 atm from an initial volume of 2.50 L to a final volume of 4.50 L. the change in internal energy DeltaU of the gas in joules will be-

    A
    `-500J`
    B
    `-505J`
    C
    `+505J`
    D
    `1136.25J`

    • Similar Questions

    Explore conceptually related problems

    What amount of work is done if an ideal gas expands from 10 L of 20 L at 2 atm pressure?

    The amount of work done when a gas is expanded from a volume of 5 L to 10 L against a constant external pressure of 2 atm is used to heat 15 g of water present at a temperature of 300 K. Calculate the final temperature of water. (Given : molar heat capacity of water = 75.6 J. K^(-1). " mol"^(-1) ).

    Three sample, A,B,C of a gas initially have the same volume. The volume of each sample is doubled by the following processes: (i) isothermal process on A, (ii) adiabatic process on B, and (iii) isobaric process on C. In which process will the work done be highest?

    A cylinder fitted with a piston contains an ideal gas with a volume of 21 L. the gas is compressed isothermally to 1/3 rd of its initial volume under a constant external pressure of 3 atm. Calculate q, w and DeltaU .

    The pressure of 3 mol of an ideal gas is 10 atm at 27^(@)C . Calculate work done by the gas when it is expanded isothermally against an external pressure of 1 atm.

    Home
    Profile