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Find the change in internal energy (in j...

Find the change in internal energy (in joule) of a gas when it absorbs `40 calories` of heat and performs work equal to `16 J`.

Text Solution

Verified by Experts

The correct Answer is:
8
Here, `dU=? dQ=40cal.= 40xx4.2= 168 J`
`dW= 160J`
From `dQ= dU+dW`
`dU= dQ-dW= 168-160= 8 J`
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Knowledge Check

  • Find the change in internal energy of the system when a system absorbs 2 kilocalorie of heat and at the same time does 500 joule of work

    A
    `7900J`
    B
    `8200J`
    C
    `5600J`
    D
    `6400J`

  • The internal energy change in a system that has absorbed 2 Kcals of heat and done 500 J of work is

    A
    6400 J
    B
    5400 J
    C
    7900 J
    D
    8900 J

  • The internal energy change in a system that has absorbed 2 kcal of heat and done 500J of work is

    A
    `8900J`
    B
    `6400J`
    C
    `5400J`
    D
    `7900J`