Home
Class 11
CHEMISTRY
A certain mass of gas expanded from ( 1L...

A certain mass of gas expanded from ( 1L, 10 atm) to (4 L, 5 atm) against a constant external pressure of 1 atm. If initial temperature of gas is 300 K and the heat capacity of process is `50 J//^(@)C`. Then the enthalpy change during the process is :
(`1"L" "atm" underline ~ 100 J`)

A

`Delta H = 15 kJ`

B

`Delta H = 15.7 kJ`

C

`Delta H = 14.4 kJ`

D

Delta H = 14.7 kJ`

Text Solution

Verified by Experts

The correct Answer is:
B
`(P_(1)V_(1))/(T_(1)) = (P_(2)V_(2))/(T_(2)) rArr T_(2) 600 K, q = C. Delta T = 15 KJ`
`w = P_("ext") Delta V = 1 (4 - 1) = 0.3KJ Delta U = 14.7 KJ`
`Delta H = 14.7 + (5 xx 4 - 10 xx 1) xx 100 xx 10^(-3) = 15.7 KJ`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • THERMODYNAMICS

    NARAYNA|Exercise Passages|13 Videos

  • THERMODYNAMICS

    NARAYNA|Exercise Matching type|6 Videos

  • THERMODYNAMICS

    NARAYNA|Exercise Level -V|106 Videos

  • STRUCTURE OF ATOM

    NARAYNA|Exercise EXERCISE - IV EXEMPLAR PROBLEMS|24 Videos

Similar Questions

Explore conceptually related problems

A certain mass of an ideal gas is expanded from (1L, 10 bar) to (4L,5bar) against a constant external pressure of 1 bar. If initial temperature of gas is 300 K and the heat capacity of process is 50J//""^(@)C . Then the enthalpy change during the process is :

A certain gas in expanded from (1L, 10 atm) to (4L, 5 atm) against a constnt external pressure of 1atm . If the initial temperature of gas is 300K and heat capacity for the process is 50J^(@)C^(-1) , the enthalpy change during the process is: (use: 1L-atm = 100J)

Knowledge Check

  • A certain mass of a gas is expended from [2 L, 20 atm, 300 K] to [5 L, 10 atm, 320 K] against a constant external pressure of 5 atm. If heat capacity of the gas is 100J//^(@)C then enthalapy change of the process will be : [1 atm lit. = 100 J]

    A
    2 kJ
    B
    0.5 kJ
    C
    1.5 kJ
    D
    1 kJ

  • 5 mole of an ideal gas expand isothermally and irreversibly from a pressure of 10 atm to 1 atm against a constant external pressure of 1 atm. w_(irr) at 300 K is :

    A
    `-15.921 kJ`
    B
    `-11.224 kJ`
    C
    `-110.83 kJ`
    D
    None of these

  • What is the work done when 1 mole of a gas expands isothermally from 25 L to 250 L at a constant pressure of 1 atm and a temperature of 300 K ?

    A
    `-3542 J`
    B
    `-5744J`
    C
    `-2657J`
    D
    `-4890J`

    • Similar Questions

    Explore conceptually related problems

    A certain mass of a gas is expanded from (1L, 10 atm) to (4L, 5 atm) against a constant external pressure of 1 atm . If initial temperature of gas is 300 K and the heat capacity of process is 50 J//^(@)C. Calculate DeltaH (in kJ) of the process .(Given 1 L atm = 100 J). (Fill your answer by multiplying it with 100 )

    A gas expands from 4.0 L to 4.5 L against a constant external pressure of 1 atm. The work done by the gas is (1 L-atm = 101.3 J)

    If a gas at a pressure of 10 atm at 300 K expands against a constant external pressure of 2 atm from a vol. 10 litres to 20 litres find work done ? [Isothermal process]

    Calculate work done by 1 mole of ideal gas expand isothermally and irreversibly from pressure of 5 atm to 2 atm against a constant external pressure of 1 atm at 300 K temperature.

    A gas expands in volume from 2L to 5L against a pressure of 1 atm at constant temperature. The work done by the gas will be

    Home
    Profile